assignment of class 7 science

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CBSE Worksheets for Class 7 Science

CBSE Worksheets for Class 7 Science: One of the best teaching strategies employed in most classrooms today is Worksheets. CBSE Class 7 Science Worksheet for students has been used by teachers & students to develop logical, lingual, analytical, and problem-solving capabilities. So in order to help you with that, we at WorksheetsBuddy have come up with Kendriya Vidyalaya Class 7 Science Worksheets for the students of Class 7. All our CBSE NCERT Class 7 Science practice worksheets are designed for helping students to understand various topics, practice skills and improve their subject knowledge which in turn helps students to improve their academic performance. These chapter wise test papers for Class 7 Science will be useful to test your conceptual understanding.

Board: Central Board of Secondary Education(www.cbse.nic.in) Subject: Class 7 Science Number of Worksheets: 139

CBSE Class 7 Science Worksheets PDF

All the CBSE Worksheets for Class 7 Science provided in this page are provided for free which can be downloaded by students, teachers as well as by parents. We have covered all the Class 7 Science important questions and answers in the worksheets which are included in CBSE NCERT Syllabus. Just click on the following link and download the CBSE Class 7 Science Worksheet. CBSE Worksheets for Class 7 Science can also use like assignments for Class 7 Science students.

• Grade 7 Nutrition in Plants Worksheets
• Grade 7 Nutrition in Animals Worksheets
• Grade 7 Fibre to Fabric Worksheets
• Grade 7 Heat Worksheets
• Grade 7 Acids, Bases and Salts Worksheets
• Grade 7 Physical and Chemical Changes Worksheets
• Grade 7 Weather, Climate and Adaptations of Animals to Climate Worksheets
• Grade 7 Winds, Storms and Cyclones Worksheets
• Grade 7 Soil Worksheets
• Grade 7 Respiration in Organisms Worksheets
• Grade 7 Transportation in Animals and Plants Worksheets
• Grade 7 Reproduction in Plants Worksheets
• Grade 7 Motion and Time Worksheets
• Grade 7 Electric Current and Its Effects Worksheets
• Grade 7 Light Worksheets
• Grade 7 Water: A Precious Resource Worksheets
• Grade 7 Forests: Our Lifeline Worksheets
• Grade 7 Wastewater Story Worksheets
• CBSE Worksheets for Class 7 Science Acids, Bases and Salts Assignment 1
• CBSE Worksheets for Class 7 Science Acids, Bases and Salts Assignment 2
• CBSE Worksheets for Class 7 Science Acids, Bases and Salts Assignment 3
• CBSE Worksheets for Class 7 Science Acids, Bases and Salts Assignment 4
• CBSE Worksheets for Class 7 Science Acids, Bases and Salts Assignment 5
• CBSE Worksheets for Class 7 Science Acids, Bases and Salts Assignment 6
• CBSE Worksheets for Class 7 Science Acids, Bases and Salts Assignment 7
• CBSE Worksheets for Class 7 Science Aerobic and Anaerobic Respiration Assignment
• CBSE Worksheets for Class 7 Science All Chapters Assignment
• CBSE Worksheets for Class 7 Science Battery Assignment
• CBSE Worksheets for Class 7 Science Biology Assignment
• CBSE Worksheets for Class 7 Science Breeze Assignment
• CBSE Worksheets for Class 7 Science Changes and Reactions and Electricity Assignment
• CBSE Worksheets for Class 7 Science Chemistry Assignment
• CBSE Worksheets for Class 7 Science Cigarette Assignment
• CBSE Worksheets for Class 7 Science Converging lens Assignment
• CBSE Worksheets for Class 7 Science Cyclone or Hurricane Assignment
• CBSE Worksheets for Class 7 Science Democracy and Equality Assignment
• CBSE Worksheets for Class 7 Science Electric Current & Its Effects Assignment
• CBSE Worksheets for Class 7 Science Fibre to Fabric Assignment 1
• CBSE Worksheets for Class 7 Science Fibre to Fabric Assignment 2
• CBSE Worksheets for Class 7 Science Fibres from Animals Assignment
• CBSE Worksheets for Class 7 Science Food Assignment
• CBSE Worksheets for Class 7 Science Forest Assignment
• CBSE Worksheets for Class 7 Science Heat Assignment 1
• CBSE Worksheets for Class 7 Science Heat Assignment 2
• CBSE Worksheets for Class 7 Science Heat Assignment 3
• CBSE Worksheets for Class 7 Science Heat Assignment 4
• CBSE Worksheets for Class 7 Science Heat Assignment 5
• CBSE Worksheets for Class 7 Science Human Digestive System Assignment
• CBSE Worksheets for Class 7 Science Identify who am I Assignment
• CBSE Worksheets for Class 7 Science Inventors Challenge Assignment
• CBSE Worksheets for Class 7 Science Light Assignment 1
• CBSE Worksheets for Class 7 Science Light Assignment 2
• CBSE Worksheets for Class 7 Science Light and Water Assignment
• CBSE Worksheets for Class 7 Science Litmus Solution Assignment
• CBSE Worksheets for Class 7 Science Markets around us Assignment
• CBSE Worksheets for Class 7 Science Motion Assignment 1
• CBSE Worksheets for Class 7 Science Motion Assignment 2
• CBSE Worksheets for Class 7 Science Nutrition in Animals Assignment 1
• CBSE Worksheets for Class 7 Science Nutrition in Animals Assignment 2
• CBSE Worksheets for Class 7 Science Nutrition in Animals Assignment 3
• CBSE Worksheets for Class 7 Science Nutrition in Animals Assignment 4
• CBSE Worksheets for Class 7 Science Nutrition in Plants Assignment 1
• CBSE Worksheets for Class 7 Science Nutrition in Plants Assignment 2
• CBSE Worksheets for Class 7 Science Nutrition Assignment
• CBSE Worksheets for Class 7 Science Obtaining and Utilizing Food Assignment
• CBSE Worksheets for Class 7 Science Physical & Chemical Changes Assignment
• CBSE Worksheets for Class 7 Science Physical and Chemical Change Assignment 1
• CBSE Worksheets for Class 7 Science Physical and Chemical Change Assignment 2
• CBSE Worksheets for Class 7 Science Physical and Chemical Change Assignment 3
• CBSE Worksheets for Class 7 Science Physical and Chemical Change Assignment 4
• CBSE Worksheets for Class 7 Science Physics Chemistry Biology Assignment 1
• CBSE Worksheets for Class 7 Science Physics Chemistry Biology Assignment 2
• CBSE Worksheets for Class 7 Science Physics Chemistry Biology Assignment 3
• CBSE Worksheets for Class 7 Science Physics Chemistry Biology Assignment 4
• CBSE Worksheets for Class 7 Science Physics Chemistry Biology Assignment 5
• CBSE Worksheets for Class 7 Science Physics Chemistry Biology Assignment 6
• CBSE Worksheets for Class 7 Science Physics Chemistry Biology Assignment 7
• CBSE Worksheets for Class 7 Science Physics Chemistry Biology Assignment 8
• CBSE Worksheets for Class 7 Science Plants Assignment 1
• CBSE Worksheets for Class 7 Science Plants Assignment 2
• CBSE Worksheets for Class 7 Science Real and Virtual Image Assignment
• CBSE Worksheets for Class 7 Science Reproduction In Plants Assignment 1
• CBSE Worksheets for Class 7 Science Reproduction In Plants Assignment 2
• CBSE Worksheets for Class 7 Science Reproduction In Plants Assignment 3
• CBSE Worksheets for Class 7 Science Reproduction Assignment
• CBSE Worksheets for Class 7 Science Respiration In Animals Assignment
• CBSE Worksheets for Class 7 Science Science and Technology Assignment 1
• CBSE Worksheets for Class 7 Science Science and Technology Assignment 2
• CBSE Worksheets for Class 7 Science Sandy soil Assignment 1
• CBSE Worksheets for Class 7 Science Soil Assignment 1
• CBSE Worksheets for Class 7 Science Soil Assignment 2
• CBSE Worksheets for Class 7 Science Soil Assignment 3
• CBSE Worksheets for Class 7 Science Soil Rocks Assignment
• CBSE Worksheets for Class 7 Science Temperature Assignment
• CBSE Worksheets for Class 7 Science The Language of Chemistry Assignment
• CBSE Worksheets for Class 7 Science Time, Motion and Speed Assignment
• CBSE Worksheets for Class 7 Science Transport and Excretion Assignment
• CBSE Worksheets for Class 7 Science Transportation In Plants And Animals Assignment
• CBSE Worksheets for Class 7 Science Waste Management Assignment
• CBSE Worksheets for Class 7 Science Waste Water Story Assignment
• CBSE Worksheets for Class 7 Science Physical and Chemical Change Assignment
• CBSE Worksheets for Class 7 Science Weather Climate and Adaptations Assignment 1
• CBSE Worksheets for Class 7 Science Weather Climate and Adaptations Assignment 2
• CBSE Worksheets for Class 7 Science Weather Climate and Adaptations Assignment 3
• CBSE Worksheets for Class 7 Science Winds Storms and Cyclones Assignment
• CBSE Worksheets for Class 7 Science Acid, bases and salts, Soil Assignment
• CBSE Worksheets for Class 7 Science Heat, Electric Current and its Effects Assignment
• CBSE Worksheets for Class 7 Science Heat Assignment
• CBSE Worksheets for Class 7 Science Respiration in Organisms Assignment
• CBSE Worksheets for Class 7 Science Project Assignment
• CBSE Worksheets for Class 7 Science Electric Current And Its Effects Assignment
• CBSE Worksheets for Class 7 Science Fibre to Fabric Assignment
• CBSE Worksheets for Class 7 Science Forest – Our Life Line Assignment
• CBSE Worksheets for Class 7 Science Light Assignment
• CBSE Worksheets for Class 7 Science Nutrition in Animals Assignment
• CBSE Worksheets for Class 7 Science Nutrition in Plants Assignment
• CBSE Worksheets for Class 7 Science Reproduction In Plants Assignment
• CBSE Worksheets for Class 7 Science Respiration In Organisms Assignment
• CBSE Worksheets for Class 7 Science Soil Assignment
• CBSE Worksheets for Class 7 Science Transportation In Animals And Plants Assignment
• CBSE Worksheets for Class 7 Science Water – A Precious Recourse Assignment
• CBSE Worksheets for Class 7 Science Weather, Climate and Adaptations of animals to climate Assignment
• CBSE Worksheets for Class 7 Science Winds, Storms and Cyclones Assignment
• CBSE Worksheets for Class 7 Science Assignment 1
• CBSE Worksheets for Class 7 Science Assignment 2
• CBSE Worksheets for Class 7 Science Assignment 3
• CBSE Worksheets for Class 7 Science Assignment 4
• CBSE Worksheets for Class 7 Science Assignment 5
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• CBSE Worksheets for Class 7 Science Assignment 29
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• CBSE Worksheets for Class 7 Science Assignment 31

Advantages of CBSE Class 7 Science Worksheets

• By practising NCERT CBSE Class 7 Science Worksheet , students can improve their problem solving skills.
• Helps to develop the subject knowledge in a simple, fun and interactive way.
• No need for tuition or attend extra classes if students practise on worksheets daily.
• Working on CBSE worksheets are time-saving.
• Helps students to promote hands-on learning.
• One of the helpful resources used in classroom revision.
• CBSE Class 7 Science Workbook Helps to improve subject-knowledge.
• CBSE Class 7 Science Worksheets encourages classroom activities.

Worksheets of CBSE Class 7 Science are devised by experts of WorksheetsBuddy experts who have great experience and expertise in teaching Maths. So practising these worksheets will promote students problem-solving skills and subject knowledge in an interactive method. Students can also download CBSE Class 7 Science Chapter wise question bank pdf and access it anytime, anywhere for free. Browse further to download free CBSE Class 7 Science Worksheets PDF .

Now that you are provided all the necessary information regarding CBSE Class 7 Science Worksheet and we hope this detailed article is helpful. So Students who are preparing for the exams must need to have great solving skills. And in order to have these skills, one must practice enough of Class 7 Science revision worksheets . And more importantly, students should need to follow through the worksheets after completing their syllabus.  Working on CBSE Class 7 Science Worksheets will be a great help to secure good marks in the examination. So start working on Class 7 Science Worksheets to secure good score.

CBSE Worksheets For Class 7

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NCERT Books and Solutions for all classes

Assignments Class 7 Science Pdf Download

Students can refer to Assignments for Class 7 Science available for download in Pdf. We have given below links to subject-wise free printable Assignments for Science Class 7 which you can download easily. All assignments have a collection of questions and answers designed for all topics given in your latest NCERT Books for Class 7 Science for the current academic session. All Assignments for Science Grade 7 have been designed by expert faculty members and have been designed based on the type of questions asked in standard 7 class tests and exams. All Free printable Assignments for NCERT CBSE Class 7, practice worksheets, and question banks have been designed to help you understand all concepts properly. Practicing questions given in CBSE NCERT printable assignments for Class 7 with solutions and answers will help you to further improve your understanding. Our faculty have used the latest syllabus for Class 7. You can click on the links below to download all Pdf assignments for class 7 for free. You can get the best collection of Kendriya Vidyalaya Class 7 Science assignments and questions workbooks below.

Class 7 Science Assignments Pdf Download

CBSE NCERT KVS Assignments for Science Class 7 have been provided below covering all chapters given in your CBSE NCERT books. We have provided below a good collection of assignments in Pdf for Science standard 7th covering Class 7 questions and answers for Science. These practice test papers and workbooks with question banks for Class 7 Science Pdf Download and free CBSE Assignments for Class 7 are really beneficial for you and will support in preparing for class tests and exams. Standard 7th students can download in Pdf by clicking on the links below.

Subjectwise Assignments for Class 7 Science

Benefits of Solving Class 7 Science Assignments

• The best collection of Grade 7 assignments for Science have been provided below which will help you in getting better marks in class tests and exams.
• The solved question for Class 7 Science will help you to gain more confidence to attempt all types of problems in exams
• Latest NCERT Books for Class 7 Science have been referred to for designing these assignments
• We have provided step by step solutions for all questions in the Class 7 assignments so that you can understand the solutions in detail.
• We have provided single click download links to all chapterwise worksheets and assignments in Pdf.
• Class 7 practice question banks will support to enhance subject knowledge and therefore help to get better marks in exam

FAQs by Science Students in Class 7

At https://www.ncertbooksolutions.com is the best website that has the biggest collection of free printable assignments for Class 7 Science.

We provide here Standard 7 subject-wise assignments which can be easily downloaded in Pdf format for free. Our teachers have provided these Grade 7 Science test sheets for Science given in your books.

You can click on the links above and get assignments for Science in Grade 7, all chapters and topic-wise question banks with solutions have been provided here. You can click on the links to download in Pdf.

We have provided here subject-wise Grade 7 Science question banks, revision notes and questions for all difficult topics, and other study material. You can download it all without any charge by clicking on the links provided above.

We have provided the best quality question bank for Class 7 for Science available for Pdf Download. You can download them all and use them offline without the internet.

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Class 7 science notes ,Worksheets and NCERT Solutions

How to use this page to learn science.

• First read and understand the notes.
• Try to go through the solved examples of of the chapter you are reading
• Now it is the time to solve unsolved assignments and worksheets. You will find plenty of them here or on the respective chapter page.

Chapter 1 Nutrition in Plants

• Nutrition in Plants Class 7 Notes
• Nutrition in Plants Important Questions
• Nutrition in Plants Worksheet
• Nutrition in Plants NCERT Solutions

Chapter 2 Nutrition in animals

• Nutrition in animals Class 7 Notes
• Nutrition in animals Important Questions
• Nutrition in animals Worksheet
• Nutrition in animals NCERT Solutions

Chapter 3 Fibre to Fabric

• Fibre to Fabric Notes for Class 7
• Fibre to Fabric Class 7 NCERT Solutions
• Fibre to Fabric Worksheet
• Fibre to Fabric Important Questions

Chapter 4 Heat

• Heat Class 7 Science Notes
• Heat Worksheet-1(Download PDF)
• Heat Worksheet-2(Download PDF)
• Heat Extra Questions
• Heat NCERT Solutions

Chapter 5 Acid base and Salt

• Acid Base and Salt Notes for Class 7
• Acid base and Salt NCERT Solutions
• Acid base and Salt Worksheet Class 7

Chapter 6 Physical and Chemical changes

• Physical and Chemical changes notes for Class 7
• Physical and Chemical changes NCERT Solutions
• Physical and Chemical changes Questions With Answers

Chapter 7 Weather Climate and Adaptations of Animals to Climate

• Weather & climate NCERT Solutions
• Weather Climate and Adaptations Important Questions

Chapter 8 Winds Storms and Cyclone

• Winds Storms and Cyclones Class 7 Notes
• Winds and Storms class 7 NCERT Solutions
• Wind Storm and Cyclone Class 7 worksheet

Chapter 9 Soil

• Soil Notes Class 7
• Soil NCERT Solutions
• Soil Class 7 Worksheet
• Soil Class 7 Questions & answers

Chapter 10 Respiration in Organisms Science

• Respiration in Organisms Class 7 Notes
• Respiration in organisms Class 7 NCERT Solutions
• Respiration in organisms Class 7 Important questions
• respiration in organisms class 7 worksheet with answers

Chapter 11 Transportation in Animals and Plants Science

• Transportation in Animals and Plants Notes
• Transportation in Animals and Plants NCERT Solutions
• Transportation in Animals and Plants Worksheet

Chapter 12 Reproduction of Plants Science

• Reproduction in Plants class 7 notes
• Reproduction of Plants Class 7 NCERT Solutions
• Reproduction of Plants Class 7 Important Questions
• reproduction in plants class 7 worksheet

Chapter 13 Motion and time

• Motion and time Class 7 notes
• Motion and time Class 7 NCERT Solutions
• Motion and time Class 7 Worksheet

Chapter 14 Electric Currents and its effects

• Electric Currents and its effects Class 7 Notes
• Electric Currents and its effects Class 7 extra Questions
• lectric current and its effects class 7 questions and answers

Chapter 15 Light

• Light Class 7 Notes
• Light Class 7 NCERT Solutions
• Light worksheet Class 7
• light Class 7 Questions and Answers

Chapter 16 Water: A Precious resource

• Water A Precious Resource Class 7 Notes
• NCERT Solutions Water A Precious Resource
• Water A precious resource worksheet
• water a precious resource class 7 questions and answers

Chapter 17 Forests Our Lifeline

• Forest Our Lifeline Class 7 Notes
• Forest Our Lifeline NCERT Solutions
• Forest Our Lifeline Important questions
• forest our lifeline class 7 worksheet

Chapter 18 Wastewater story

• Wastewater story Notes for Class 7
• Wastewater story Worksheet
• wastewater story class 7 questions with answers

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AssignmentsBag.com

Assignments For Class 7 Science

Assignments for Class 7 Science have been developed for Standard 7 students based on the latest syllabus and textbooks applicable in CBSE, NCERT and KVS schools. Parents and students can download the full collection of class assignments for class 7 Science from our website as we have provided all topic wise assignments free in PDF format which can be downloaded easily. Students are recommended to do these assignments daily by taking printouts and going through the questions and answers for Grade 7 Science. You should try to do these test assignments on a daily basis so that you are able to understand the concepts and details of each chapter in your Science book and get good marks in class 7 exams.

Assignments for Class 7 Science as per CBSE NCERT pattern

All students studying in Grade 7 Science should download the assignments provided here and use them for their daily routine practice. This will help them to get better grades in Science exam for standard 7. We have made sure that all topics given in your textbook for Science which is suggested in Class 7 have been covered ad we have made assignments and test papers for all topics which your teacher has been teaching in your class. All chapter wise assignments have been made by our teachers after full research of each important topic in the textbooks so that you have enough questions and their solutions to help them practice so that they are able to get full practice and understanding of all important topics. Our teachers at https://www.assignmentsbag.com have made sure that all test papers have been designed as per CBSE, NCERT and KVS syllabus and examination pattern. These question banks have been recommended in various schools and have supported many students to practice and further enhance their scores in school and have also assisted them to appear in other school level tests and examinations. Its easy to take print of thee assignments as all are available in PDF format.

Some advantages of Free Assignments for Class 7 Science

• Solving Assignments for Science Class 7 helps to further enhance understanding of the topics given in your text book which will help you to get better marks
• By solving one assignments given in your class by Science teacher for class 7 will help you to keep in touch with the topic thus reducing dependence on last minute studies
• You will be able to understand the type of questions which are expected in your Science class test
• You will be able to revise all topics given in the ebook for Class 7 Science as all questions have been provided in the question banks
• NCERT Class 7 Science Workbooks will surely help you to make your concepts stronger and better than anyone else in your class.
• Parents will be able to take print out of the assignments and give to their child easily.

All free Printable practice assignments are in PDF single lick download format and have been prepared by Class 7 Science teachers after full study of all topics which have been given in each chapter so that the students are able to take complete benefit from the worksheets. The Chapter wise question bank and revision assignments can be accessed free and anywhere. Go ahead and click on the links above to download free CBSE Class 7 Science Assignments PDF.

Free PDF download of Science Assignment for Class 7 with Answers created by master educators from the latest syllabus of CBSE Boards. By practicing this Science Assignment for Class 7 will help you to score more checks in your CBSE Board Examinations. We give free CBSE Solutions (NCERT) and other study materials for students to make their preparation better.

Students who are searching for better solutions can download science assignments for class 7 to assist you with revising the whole syllabus and score higher marks in your exam.

These Class 7 Science Assignment show up with an answer key with step-by-step answers for students to comprehend the problem at each level and ​not retain it.

Since you are given all the essential data with respect to the Acid Bases and Salts Class 7 Assignment Science and we trust this definite article is useful. So Students who are planning for the Exam should have to have better-solving skills. What’s more, to have these skills, one should rehearse enough of the Acid Bases and Salts 7th Class Assignment Science. Also, most importantly, students should have to finish the assignments after completing their syllabus. Dealing with the Acid Bases and Salts Class 7 assignment with answers will be more helpful to get good marks in the exam. So begin your preparation on Assignment for Class 7 Science to score higher marks.

You can download free assignments for class 7 Science from https://www.assignmentsbag.com

You can get free PDF downloadable assignments for Grade 7 Science from our website which has been developed by teachers after doing extensive research in each topic.

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NCERT Solutions for Class 7 Science

Chapter Wise Class 7 Science NCERT Solutions Chapter 1. Nutrition in Plants Chapter 2. Nutrition in Animals Chapter 3. Heat Chapter 4. Acids, Bases and Salts Chapter 5. Physical and Chemical Changes Chapter 6. Respiration in Organisms Chapter 7. Transportation in Animals and Plants Chapter 8. Reproduction in Plants Chapter 9. Motion and Time Chapter 10. Electric Current and its Effects Chapter 11. Light Chapter 12. Forests: Our Lifeline Chapter 13. Wastewater Story

Get here NCERT Solutions for Class 7 Science in Hindi and English Medium revised and modified PDF files. All the solutions are update for new academic session 2024-25. Tiwari Academy typically provides detailed solutions for all chapters and topics covered in the Class 7 Science NCERT textbook. This ensures that students have access to solutions for every concept they encounter in their curriculum. According to new NCERT books published for 2024-25 exams, there are only 13 chapters in 7th Science curriculum.

NCERT Solutions of Class 7 Science

Scientific knowledge drives technological advancements. By studying science, students gain the foundation needed to contribute to and benefit from technological progress. The solutions on Tiwari Academy are often designed to be easy to understand, making complex scientific concepts more accessible to students. This can be particularly helpful for students who may find certain topics challenging.

Students can download 7th Science NCERT Solutions for the new session 2024-25 based on latest NCERT Books. Exercises questions are solved in simple language so that students can understand easily. All the contents on Tiwari Academy website or Apps are free to use. There is not any login or password condition to access the contents.

Online Books for class 7 science and their solutions can be downloaded without any registration. NCERT Solutions for class 7th other subjects are also given free to download. Android and iOS Offline Apps (for iPhone and iPad) for Class 7 Science in Hindi and English Medium is available on Play Store. If someone feel any inconvenience to get the textbook solutions or other study material, please contact us for help. We help all without any charges.

The simplified NCERT Solutions for Class 7 Science are now available in both English Medium and Hindi Medium free to download. The resources on Tiwari Academy are available for free, making it a cost-effective option for students and parents who are looking for extra help with Class 7 Science. These solutions are updated for current session 2024-25.

Science fosters creativity and innovation. Many scientific breakthroughs result from thinking outside the box and challenging existing theories or ideas. Tiwari Academy may provide sample papers, Study Material and previous years’ question papers, which can be valuable for exam preparation. These resources can help students become familiar with the exam pattern and question types.

Assignments related to Class 7 Science will be uploaded in the current academic session 2024-25 and Tiwari Academy can serve as a valuable supplement to classroom learning. It can help students reinforce what they have learned in school and provide additional explanations and examples. Students should verify the accuracy of the solutions provided on external websites like Tiwari Academy to ensure they align with the official NCERT curriculum.

How to Improve Study in Class 7 Science

According to new NCERT textbooks issued for 2024-25 exams, class 7 Science contains total of 13 chapter for academic session 2024-25. Using Class 7 Science NCERT Solutions at Tiwari Academy can offer several advantages for students studying this subject. Now the entire syllabus is reduced for terminal exams. So, in this way a student of class 7 can score well in Science exams. Here we are going to describe the ways to score maximum marks in least efforts. Tiwari Academy allows students to learn at their own pace. They can revisit the solutions and resources as many times as needed to grasp the concepts fully. Follow the tips and tricks given here to score 100 marks easily in class 7 Science Subject.

Step 1: Follow the curriculum 2024-25 for 7th Science exam.

Step 2: strictly follow the time table during study hours., step 3: spend extra time for practice after doing homework., step 4: test yourself regularly by helping the classmate., step 5: practicing questions based on each paragraph of the lesson..

Important questions from popular books, Vedic Maths , assignments, test papers, notes and online study material and may other things will be made available time to time. If you need any help, please feel free to contact us. We will make changes according to your suggestions.

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• Important Questions for CBSE Class 7 Science Chapter 1 - Nutrition in Plants

Boost Your Performance in CBSE Class 7 Science Exam Chapter 1 with Important Questions

This is a crucial chapter for students studying this subject as they can learn about the various ways in which nutrition can be beneficial for plants and animals. Class 7 is an extremely vital year for students because it is the first year of middle school for school kids. The topics covered during this year's syllabus is vital because it sets the idea for the upcoming years. Students will learn topics that will help set the groundwork for the 10th standard and help them in their later grades…

In this year's science subjects students will take a deep dive into chemistry, physics, and biology. Students during this chapter will study about nutrition and how it's beneficial for everyone. This text will go over the important topics in the chapter and therefore the essential questions for this chapter also. Students can learn easily using this text and study the way to score marks more easily in these subjects. Students got to prepare themselves for this subject because it can often be quite complex if students don't use any guidance. This article will help students get in their way around chapter1 class 7 science chapter 1.

Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. You can download NCERT Class 7 Science and Class 7 Maths NCERT Solutions to help you to revise the complete syllabus and score more marks in your examinations.

Important Topics Covered Under CBSE Class 7 Science Chapter 1 - Nutrition in Plants

Given below are the topics which the students will learn in CBSE Class 7 Science Chapter 1 - Nutrition in Plants:

Different Modes of Nutrition in Plants

Photosynthesis in Plants - How do the plants make food?

What are the other modes of nutrition in Plants?

What are Saprophytes?

Process of nutrition in the soil

Study Important Questions for Class 7 Science Chapter 1- Nutrition in Plants

A) very short answer questions (1 mark).

1. Fill in the blanks: 

i. The components essential for our body are called ____________. 

Ans: Nutrients 

ii. We obtain nutrients through ______________ . 

Ans : Food 

iii. Carbohydrates, _______________ and fats are important nutrients. 

Ans : Proteins 

iv.  ____________ can make their own food from simple nutrients. 

Ans: Plants/Autotrophs 

v. All animals are directly or indirectly _____________ on plants for food. 

Ans: Depend 

2.  State whether true or false. If false, correct the statement by changing the underlined word

a. Animals are the only organisms that can prepare their own food using simple substances from their surroundings. 

Ans: The given statement is false. Plants are the only organisms that can prepare their own food using simple substances from the surroundings. 

b. The intake of food by an organism is called nutrition. 

Ans: The given statement is true. 

c. Stomata absorb sunlight for photosynthesis. 

Ans: The given statement is false. Chlorophyll absorbs sunlight for photosynthesis. 

d. Insectivorous plants are autotrophic.  

Ans: The given statement is false. Insectivorous plants are partially heterotrophic. 

e.  Starch on reacting with iodine solution turns brown in color. 

Ans: The given statement is false. Starch on reacting with iodine turns blue-black in color. 

3. Define the following terms: 

a. Nutrition 

Ans : The process by which an organism receives and digests food to get the nutrients insoluble and simple forms is called Nutrition.

b. Autotrophs 

Ans: The organisms which can build their own food with the help of molecules like carbon dioxide gas and water from their surroundings with the assistance of sunlight and chlorophyll are called Autotrophs.

c. Photosynthesis 

Ans: The process by which organisms use sunlight to synthesize nutrients from carbon dioxide and water to create their own food is called Photosynthesis. In plants photosynthesis generally involves the green pigment called chlorophyll and generates oxygen as a secondary product.

d.  Host 

Ans: An organism that provides nourishment and/or shelters to some other organism is called a Host. The host supports and provides nourishment for the parasite (guest) and hence the host is negatively affected by this relationship. 

e. Parasite 

Ans: An organism that lives inside or on an organism of another species (its host) and which relies on the host for all the nutrients is called Parasite. The parasite is not able to survive without the host body.

B. Short Answer Questions (3 marks)

1. What are stomata? Explain their function. 

Ans: The tiny pores present on the underside of the leaf surface and surrounded by guard cells are called stomata. 

The functions of stomata include, 

Exchanging gases by the process called diffusion for photosynthesis and respiration. 

Transpiration of water i.e. the loss of excess water from the plant by evaporation of water from the upper surface of the leaf. 

2. How is sunlight used by the plant for photosynthesis? 

The main energy source for photosynthesis is sunlight. 

Sunlight is trapped by the green pigment chlorophyll which is present in all green parts of the plants including leaves. 

The energy of the sunlight converts water and carbon dioxide into a sugar called glucose. 

Glucose is used by plants for generating energy and to make other essential substances like cellulose and starch.

3. Why are some plants insectivorous? Give examples. 

Ans:  

Plants require nutrients like nitrogen in addition to carbohydrates for survival. 

In the places where there is a lack of nutrients, especially nitrogen, some plants fulfill their nitrogen requirements by digesting insects in order to absorb the necessary nitrogen. 

Examples of insectivorous plants include Venus flytrap, Utricularia, Drosera, Rafflesia, Pitcher plant, etc. 

4.  Explain the saprotrophic mode of nutrition with an example. 

Partial digestion of substrate outside the body and then absorbing the digested material into the body is called the saprotrophic mode of nutrition. 

With the saprotrophic mode of nutrition, the body releases digestive enzymes to the substrate which causes the partial breakdown of the substrate which later on gets absorbed by the body. 

Examples of organisms that follow a saprotrophic mode of nutrition include some detritivores such as fungi.

5. What is symbiosis? Explain with help of an example. 

Ans: Symbiosis is a relationship that exists between two organisms living in a close physical association which is mutually beneficial for both.

In this relationship, both organisms are equally benefited and no organism is affected by this relationship. These interactions last for a long term with the survival of both species.

Examples of organisms that follow symbiosis include lichen, mycorrhiza, etc.

C) Long Answer Questions (5 marks)

1. Explain how photosynthesis occurs in plants. 

The process by which organisms use sunlight to synthesize nutrients from carbon dioxide and water to create their own food is called Photosynthesis.

In this process, organic food like starch is synthesized by inorganic molecules like water and carbon dioxide.

The main energy source which is sunlight is trapped by the green pigment. 

Chlorophyll is present in all green parts of the plants including leaves.

The raw materials required are carbon dioxide and water where carbon dioxide is absorbed from the atmosphere and water is absorbed from the soil. 

The energy from sunlight enables a chemical reaction that converts carbon dioxide and water into glucose and oxygen. 

The overall chemical reaction during the process of photosynthesis can be represented as follows: 

$6\text{C}{{\text{O}}_{\text{2}}}\text{}+\text{}12{{\text{H}}_{\text{2}}}\text{O}\xrightarrow[\text{Chlorophyll}]{\text{Light}}{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{12}}}{{\text{O}}_{\text{6}}}\text{  +  }6{{\text{O}}_{\text{2}}}\text{  }+\text{  }6{{\text{H}}_{\text{2}}}\text{O}$

$ \text{Carbon        water                    glucose      oxygen       water}   \text{dioxide} $

2. How are nutrients replenished in soil naturally? How can the nutrients be replenished artificially? 

The source of nutrients for the plants is soil. 

Plants receive nutrients from the soil which leads to depletion of nutrients in the soil. 

Plants are unable to use nitrogen gas directly from the atmosphere. Some bacteria convert nitrogen from the atmosphere into soluble compounds that can be used by plants. 

As they live in symbiotic association with the roots of leguminous plants, the nitrogen content is replenished in the soil by their actions. Nitrogen gets replenished in the soil naturally by using leguminous plants after cereal crops in the soil. 

In an artificial way, the nutrients can be replenished by using fertilizers and manure. 

3. How can we demonstrate that chlorophyll is necessary for photosynthesis?

Necessity chlorophyll can be demonstrated by carrying out an experiment on a variegated leaf. 

Before the start of the experiment, the outline of the leaf is traced on a piece of paper and the green areas are marked. 

To allow the process of photosynthesis, the leaf is placed in sunlight for some hours. 

The leaf is then boiled in alcohol so that it gets decolorized after which the iodine solution is added to the leaf. 

It can be observed in response to iodine solution the green areas of the leaf turn blue-black which indicates that the starch is present. 

Thus, through this experiment, it can be observed that photosynthesis occurs in the green areas of the variegated leaf which shows that chlorophyll is necessary for photosynthesis. 

4. How do plants obtain nutrients other than carbohydrates? 

Plants synthesize carbohydrates using energy from sunlight to convert carbon dioxide and water to glucose and further on into starch. 

The nutrients other than carbohydrates are obtained directly from the soil. 

The nitrogen content is replenished in the soil by the action of nitrogen-fixing bacteria. Nitrogen gets replenished in the soil naturally by using leguminous plants after cereal crops in the soil. Nitrogen compounds can be replenished in artificial ways by adding fertilizers and manure to the soil. 

Some insectivorous plants like the pitcher plant and Venus flytrap get their nitrogen requirements fulfilled by consuming insects. In this process, the insects are trapped and digested by the plant and the nutrients are released into the body of the plant. 

Class 7 Science Chapter 1 Important Questions- Free PDF Download

This chapter helps students to understand the various factors revolving around nutrition. Students will learn about the very basic functions of plants and how they retrieve nutrition through photosynthesis and carbon dioxide. All these functions help plants to grow more healthy and also help support the living beings around them. In this chapter, we will look into various functions of the plants and how they store and use their food to their benefit. Students will learn a great deal of this subject and also the various topics Lack of practice and a solid course plan and curriculum may act as a barrier preventing you from securing good scores and to urge a radical comprehension of all the essential concepts and topics under this chapter and break the barriers, students must enjoy the continuous practice. Regular practice of Chapter 1 class 7Important Questions can help students improve, become through the concepts and topics, and be efficient during preparation or revision. This article also provides class 7 science chapter 1 extra questions that can benefit students during their preparation of the subject. 

Class 7th Science Chapter 1 Important Concepts 

In this chapter, we will look into various concepts and some of these are explained down below. 

This chapter takes an intrinsic look into how the plants and how it functions in the world by using the right nutrition. The following are some of the topics covered in this chapter-

Stomata 

These are tiny pores found on the underside of the surface of the leaf and are surrounded by guard cells. They play a vital role by exchanging gases during the process of respiration and photosynthesis which in turn causes transpiration of water through evaporation from the leaf surface. 

Importance of Sunlight 

Sunlight is present for most of the time during the day and the plants are very efficient in using this as it is the energy source for the process of photosynthesis. The green pigment known as chlorophyll traps the sunlight which is present all over the plant. This sunlight is later converted into chemical energy. 

Saprotrophic Mode 

This mode is a partial digestion mode of the substrate outside the body wherein the digested material is absorbed into the body. In this mode of digestion, the plant releases digestive enzymes into the substrate. The partially digested substrate is then absorbed by the organism. We can see this type of digestion in fungi. 

Symbiosis 

This is a process where two organisms are mutually benefited. Here in this process, both the organism involved is not going to be harmed in any way and they are equally benefited. One organism could provide nutrition whereas the other organism could do it with some kind of shelter and protection. 

Photosynthesis 

The process where green plants convert solar energy into chemical energy is known as photosynthesis. Inorganic molecules like carbon dioxide and water are used to synthesize food like starch. The process starts off with the trapping of sunlight which is done by the chlorophyll present in green plants. Raw materials such as water and carbon dioxide are the prime ingredients for photosynthesis. Water is absorbed from the soil and carbon dioxide is taken from the atmosphere. The sunlight is the catalyst here in this process which converts the carbon dioxide and water into starch and oxygen. Starch is used up by the plant whereas the oxygen is left out to the atmosphere for other organisms to utilize.

Nutrients Being Replenished in the Soil Naturally 

Plants are constantly using the nutrients found in the soil for their own purpose and this in turn leaves the soil depleted of its nutrients. Nitrogen gas which is present in the atmosphere cannot be directly used by the plants. This nitrogen gas has to first be converted into soluble compounds and this can help plants to solve the later process. So this process is done by bacteria found in the soil and an example of this is Rhizobium. Rhizobium is found in the roots of leguminous plants.

The Process of Plants Receiving Nutrients Other Than Carbohydrates 

Raw materials such as water and carbon dioxide are the prime ingredients for photosynthesis. Water is absorbed from the soil and carbon dioxide is taken from the atmosphere. The sunlight is the catalyst here in this process which converts the carbon dioxide and water into starch and oxygen. Most of the other nutrients that are needed are obtained from the soil directly and this is obtained because of the nitrogen-fixing bacteria known as Rhizobium. There are many ways to obtain the nutrients and we will explore deeper in the chapter. 

Important Questions for Class 7 Science Chapter 1

Students here will learn a number of the essential elements in this chapter 1 of class 7. This may help them in their future grades because it sets the groundwork. Constant practice of the essential questions should help students to tackle any difficult questions in their final examinations the following are class 7th science chapter 1 important questions -

How do plants obtain nutrients other than carbohydrates?

How can we demonstrate that chlorophyll is essential for photosynthesis?

How are nutrients replenished in the soil naturally?

How can nutrients be replenished in the soil artificially?

What is symbiosis in plants? give an example.

Explain the saprotrophic mode of nutrition in plants

Why are some plants insectivorous? Give an example

How is sunlight used by the plant?

What are stomata? Explain their function.

Differentiate between autotrophic and heterotrophic nutrition.

Describe the role of enzymes in the digestion of food.

What are the components of a balanced diet? Explain their importance.

Discuss the harmful effects of malnutrition on the human body.

What is the importance of water in the diet of organisms?

Explain the process of respiration in plants and animals.

How do herbivores, carnivores, and omnivores obtain nutrition?

Benefits of Nutrition in Plants Class 7 Important Questions 

Students must understand the importance of this subject and what it holds for college kids of sophistication 9. By utilizing the important questions and with a rigorous practice regime students are going to be ready to score the foremost out of their exams. These exams are often a touch difficult without the proper guidance but by using this article students are going to be ready to study in a more structured manner.

The Following are the Advantages of Chapter 2 Science Class 9 Important Questions

It provides students with a structure with which they will study for his or her upcoming examinations.

This is a fundamental chapter for college kids and plays an important role in upcoming grades.

Students don’t need to worry about the relevance of these questions as they're all cross-checked and updated consistently with the newest CBSE guidelines and rules. therefore the information in this article is genuine and reliable.

Students can use this text to use their time wisely, it helps boost their confidence after consistent practice and students can plan their preparation accordingly.

Students can utilize and practice the important questions so that they can ace their examinations. 

Conclusion 

These essential questions on plant nutrition greatly benefit class 7 students. this pivotal chapter serves as a foundation for middle school science, enabling students to comprehend the fundamental aspects of nutrition. exploring topics like photosynthesis and carbon dioxide, this text empowers students to optimize their time, build confidence through consistent practice, and strategize their preparation. by familiarizing themselves with these important questions, students become aware of the chapter's diverse content and develop the skills to tackle challenging exam questions through dedicated effort..

FAQs on Important Questions for CBSE Class 7 Science Chapter 1 - Nutrition in Plants

Q1. Where can I find a repository of Important Questions for Class 7 Science Chapter 1 Nutrition in Plants?

Ans: Vedantu, a trustable ed-tech company, caters to a well-prepared repository of Important Questions for Class 7 Science Chapter 1 Nutrition in Plants as well as other chapters. Vedantu is known for its top-quality study materials and other resources like sample papers, important questions, etc. It selects these questions based on the exam pattern and most frequently asked questions. Vedantu provides a free PDF of Important Questions for Class 7 Science Chapter 1 Nutrition in Plants prepared by subject experts. These questions are also solved by subject matter experts to provide a clear cut understanding of the chapter. These are extremely helpful in exam preparation and boost scores.

Q2. How to make the most of Vedantu’s Important Questions for CBSE Class 7 Science Chapter 1 Nutrition in Plants to score well in exams?

Ans: Students can solve Vedantu’s important questions for Class 7 Science Chapter 1 Nutrition in Plants to score well in school exams. The extra questions provided by the e-learning platform for the first chapter of Class 7 Science can be utilized to understand what types of questions can students expect from the exam. These questions help learn concepts and practise the chapter. At Vedantu, the set of important questions are also solved by subject matter experts. By referring to the PDF file of important questions for Class 7 Science Chapter 1 Nutrition in Plants, students will be able to practice the chapter properly and will get an idea of important questions as well. The material can also be used at the time of the revision to get exposure to new questions.

Q3. Why should I practice extra questions for Class 7 Science Chapter 1 Nutrition in Plants?

Ans: Practising extra questions for CBSE Class 7 Science Chapter 1 Nutrition in Plants is crucial to score well in the exam. The important questions for Class 7 Science Chapter 1 Nutrition in Plants allow students to practice the chapter thoroughly. Working on these questions will not only make students familiar with all types of questions that can be asked in the exam, but it will also boost their confidence. The free PDF file of Important Questions for Class 7 Science Chapter 1 at Vedantu is designed to cover all the important topics of the chapters. These questions are based on the exam pattern and the necessary guidelines. These are added after referring to previous year question papers and must be downloaded to learn the chapter properly and score well.

Q4. What are some of the important questions for Class 7 Science Chapter 1 Nutrition in Plants?

Ans: Following are a few important questions for Class 7 Science Chapter 1 Nutrition in Plants:

How are nutrients replenished in soil naturally? How can the nutrients be replenished artificially?

How can we demonstrate that chlorophyll is necessary for photosynthesis?

Explain how photosynthesis occurs in pants.

What is symbiosis? Explain with the help of an example. 

Explain the saprotrophic mode of nutrition with an example.

Download the file to get more questions for the chapter and excel in exams.

Q5. What is Nutrition?

Ans: Nutrients are a source of nourishment required by living beings to grow (building tissues) and to produce energy. There are various other short questions and answers in the NCERT textbook for which you can find the answers in NCERT Solutions provided by Vedantu . You can also focus on the Important Questions as provided by Vedantu for an easygoing revision. The important questions cover all the key fundamentals that are vital from the perspective of the exam.

Q6. What is the importance of nutrients?

Ans: Nutrients are a basic requirement in both plants and animals and are found in various ways. They are the source of nourishment which makes them vital for survival. The importance of nutrients can be categorized into two factors:

Development: Plants require nutrients to grow from a sapling into a tree. They use the nutrients to produce food, energy, and photosynthesis.

Repair: Nutrients are the basic necessity for repairing broken tissues and replacing the dead ones.

Q7. How are plants useful for all?

Ans: Through the process of photosynthesis, plants give us oxygen and take in carbon dioxide. It is not only essential for the survival of all animals and humankind, but it also cleans the atmosphere. Various species of plants are our basic resource for several food crops and fibres. We cultivate crops, take fruits from plants, and process certain plants for materials like rubber. They help in maintaining the balance in the ecosystem. Hence, they are useful to all.

Q8. What are the raw materials required for photosynthesis?

Ans: Plants require water, carbon dioxide, and sunlight as raw materials to be able to do the process of photosynthesis. It is an important event for the conversion of carbon dioxide into oxygen and energy in the form of sugar for the preparation of food in plants. This is a process conducted only by the green plants that have chlorophyll. Hence chlorophyll and the raw materials are the basic requirements for photosynthesis to take place. 

Q9. What are the types of nutrition in plants?

Ans: Plants exhibit autotrophic and heterotrophic nutrition as two modes of nutrition. Autotrophic nutrition is when plants produce their own food using sunlight, water, and carbon dioxide. While certain plants and animals depend on other plants for nutrition which is known as heterotrophic nutrition. This is because not all plants contain chlorophyll which is a necessary part of photosynthesis. Chlorophyll is the green pigment that gives green colour to the plants. To study more about nutrition, students can download the Important Questions free of cost from the Vedantu website or mobile app.

Chapterwise Important Questions for CBSE Class 7 Science

Cbse study materials.

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UP Class 7th Science

Class 7th science (up), unit 1: man, science and technology, unit 2: fiber to fabric, unit 3: structure of nature and matter, unit 4: physical and chemical changes, unit 5: heat and temperature, unit 6: nutrition in plants, unit 7: nutrition in animals, unit 8: respiration in organisms, unit 9: transport in animals and plants, unit 10: excretion in living organisms, unit 11: reproduction in plants, unit 12: beneficial and harmful plants and animals, unit 13: food, health and disease, unit 14: sound, unit 15: energy, unit 16: light, unit 17: forces and machine, unit 18: electricity, unit 19: water, unit 20: air, unit 21: computer.

• CBSE Notes For Class 7
• CBSE Class 7 Science Notes
• Chapter 5: Acids Bases And Salts

Acids, Bases and Salts Class 7 Science Notes - Chapter 5

According to the CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 4.

Acids and Bases

• Acids are substances that taste sour and are corrosive in nature.
• It turns blue litmus paper to red.
• These substances are chemically acidic in nature. For example, orange juice, curd, vinegar, hydrochloric acid etc.
• Bases are substances that, in aqueous solution, are slippery to the touch and bitter in taste.
• It turns red litmus paper to blue.
• These substances are chemically basic in nature. For example, soap, ammonium hydroxide, calcium hydroxide, etc.

For more information on Acids and Bases, watch the below video

To know more about Acid and Base, visit here .

Neutralisation Reaction

• When an acid and base react with each other to form salt, water and heat, then such a reaction is known as a neutralisation reaction.
• In this reaction, the acidic and basic nature of the acid and base, respectively, are destroyed.
• The reaction between hydrochloric acid and sodium hydroxide is a classic neutralisation reaction where sodium chloride is formed. H C l + N a O H → N a C l ( s a l t ) + H 2 O

To know more about Neutralisation Reaction, visit here .

• Salt is the product formed from the neutralisation reaction of acids and bases.
• In the reaction between hydrochloric acid and sodium hydroxide, the salt formed is sodium chloride.

        H C l + N a O H → N a C l + H 2 O

• Salt can be acidic, basic or neutral in nature.

To know more about Salts, visit here .

Visual Indicators

Substances, which are used to test whether a substance is acidic or basic, are called indicators.

Natural Indicators

• Plants or plant parts contain useful chemicals that are used for testing an acidic or basic property of a solution and are termed natural indicators. China Rose and turmeric are examples of natural indicators.
• Litmus is a naturally occurring purple indicator which is extracted from lichens.
• When added to an acidic solution, it turns red, and when added to a basic solution, it turns blue.
• It is available in the form of a solution or as strips of paper, known as litmus paper.

Phenolphthalein

• Phenolphthalein is an acid-base indicator which is colourless in an acid solution but turns pink to red as the solution becomes alkaline.
• It is a synthetic indicator and is used for the neutralisation experiment.

To know more about Phenolphthalein, visit here .

Olfactory Indicators

• Olfactory indicators are substances whose smell changes whether they are mixed with an acidic or a basic solution.
• Onion, clove oil and vanilla extract are examples of such indicators.
• Visual Indicators are substances used to show visually (as by a change in colour) the condition of a solution with respect to the presence of a particular material (as a free acid or base).
• Common examples are litmus, red cabbage, phenolphthalein, etc

Neutralization

Neutralisation in daily life.

• During indigestion, taking milk of magnesia (magnesium hydroxide) gives us relief as it neutralizes the effect of excess acid produced inside the stomach.
• The effect of ant sting, which is caused by formic acid, can be neutralized by rubbing moist baking soda (basic in nature).
• To ensure that plants can grow well, the soil is treated with either acids or bases, depending if it’s basic or acidic in nature.
• Factory wastes, generally acidic in nature and can cause environmental damage, are treated with basic substances before discharge.

To know more about “Neutralisation in Daily Life”, visit here .

Recap of Concepts

Safety measures while using acids.

• When diluting acids, pour the acid into the water, NOT water into acid, as this may cause spattering of the acid.
• Safety gloves are to be worn whenever working with acids or bases.

Uses and Applications

• Excessive use of chemical fertilisers changes the pH of the soil.
• Plants do not grow well when the soil is either too acidic or too basic.
• Hence substances are added to bring the pH to a neutral level.

Uses of Acids and Bases

• Food preservation – Citric acid.
• Aerated drinks – Carbonic acid.
• Baking powder – Tartaric acid.
• Cooking – Acetic acid(vinegar)
• Manufacture of soaps – Sodium hydroxide.
• Manufacture of bleaching powder – Calcium hydroxide
• As a foaming agent in fire extinguishers – Aluminium hydroxide.

Frequently Asked Questions on CBSE Class 7 Science Notes Chapter 5 Acids and Bases

What is the neutralisation reaction.

A neutralization reaction is a chemical reaction where an acid and a base are combined with the intent of producing a neutral pH level.

What is litmus?

Litmus paper is colouring matter from lichens that turn red in acid solutions and blue in alkaline solutions and is used as an acid-base indicator.

What is an olfactory indicator?

An olfactory indicator is a substance whose smell varies depending on whether it is mixed with an acidic or basic solution.

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