class 8 science assignment answer in english medium

NCERT Solutions for Class 8 Science Chapter 11 Chemical Effects of Electric Current

Question Wise Class 8 Science Chapter 11 Solutions Class 8 Science Chapter 11 NCERT Answers Class 8 Science Chapter 11 in Hindi Medium Class 8 Science Chapter 11 MCQ Class 8 Science NCERT Book Download Class 8 Science Chapter 11 Exemplar Book Class 8 Science Chapter 11 Exemplar Answers Class 8 Science NCERT Solutions Class 8 all Subjects NCERT Solutions

NCERT Solutions for Class 8 Science Chapter 11 Chemical Effects of Electric Current in Hindi and English Medium to Study online or download free in PDF format updated for new session 2024-25. NCERT Textbook Solutions as well as Offline Apps class 8 of other subjects are also available based on new NCERT books issued for academic year 2024-25..

Class 8 Science Chapter 11 NCERT Solutions

• Class 8 Science Chapter 11 Question Answers
• Class 8 Science Chapter 11 in Hindi Medium
• Class 8 Science Chapter 11 MCQ
• Class 8 Science Chapter 11 NCERT Book
• Class 8 Science Chapter 11 Exemplar Book
• Class 8 Science Chapter 11 Exemplar Answers
• Class 8 Science NCERT Solutions
• Class 8 all Subjects NCERT Solutions

NCERT Solutions for Class 8 Science Chapter 11 Chemical Effects of Electric Current is given below updated for CBSE Session 2024-25. Video Format solution is also available. Download 8 Science App in English and Hindi for offline use.

Class 8 Science Chapter 11 Important Questions for Practice

Does pure water conduct electricity if not, what can we do to make it conducting.

Pure or distilled water does not contain salts. Therefore it is a poor conductor of electricity. We can add impurities like salt, lemon juice, vinegar etc. to make it conducting.

In case of a fire, before the firemen use the water hoses, they shut off the main electrical supply for the area. Explain why they do this.

The water usually contain salts and is a good conductor of electricity. To save themselves and others from electric shock and to avoid any short circuit, firemen shut off the main electrical supply for the area.

When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason?

The deflection of magnetic needle indicates electric current is flowing through the wire. It means the liquid or the solution is a good conductor of electricity. When the free ends of a tester are dipped into a solution, electric circuit is completed and an electric current passes through the solution.

Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour? Explain.

No it is very risky and unsafe to carry out electric repairs outdoors during heavy downpour. Water (when impure) is a good conductor of electricity and there are chances of getting electric shock.

Class 8 Science Chapter 11 MCQ with Answers

1. An electric current can produce (a) heating effect only. (b) chemical effect only. (c) magnetic effect only. (d) chemical, heating, and magnetic effects. 2. Boojho’s uncle has set up an electroplating factory near his village. He should dispose off the waste of the factory (a) in the nearby river. (b) in the nearby pond. (c) in the nearby cornfield. (d) according to the disposal guidelines of the local authority. 3. Which one of the following solutions will not conduct electricity? (a) lemon juice (b) vinegar (c) tap water (d) vegetable oil 4. When electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates (a) the chemical effect of current. (b) the heating effect of current. (c) the magnetic effect of current. (d) the lightning effect of current. 5. Fill in the blanks (a) The object to be electroplated is taken as ____________ electrode. (b) One of the most common applications of chemical effect of electric current is ______________. (c) Small amount of a mineral salt present naturally in water makes it a______________ of electricity. (d) Electroplating of ______________ is done on objects like water taps and cycle bell to give them a shiny appearance. 6. Name the effect of current responsible for the glow of the bulb in an electric circuit. 7. Paheli wants to deposit silver on an iron spoon. She took silver nitrate (AgNO3) solution in a beaker and setup a simple circuit for electroplating. Which terminal of the battery should the spoon be connected to? What material should the other electrode be made of? 8. An electric current is passed through a conducting solution. List any three possible observations.

1 (d) 2 (d) 3 (d) 4 (a) 5 (a) Cathode (c) Conductor (b) Electroplating (d) Chromium 6 Heating effect of electric current. 7 The spoon should be connected to the negative terminal of the battery. The other electrode should be made of silver. 8 Bubbles of gas may be formed on the electrodes. Deposits of metal may be seen on electrodes. Change in the colour of the solution may take place. The solution may get heated.(Any three).

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NCERT Solutions for Class 8 Science

Ncert solutions for class 8 science – download free pdfs.

NCERT Solutions for Class 8 Science is a highly essential study tool for CBSE students studying in Class 8. NCERT Science Solutions for Class 8 are framed by expert Science teachers to help students in their exam preparation and to clear doubts instantly. With BYJU’S study material and Solutions of NCERT Science Class 8 Book , students can get the answers to the questions provided in the textbook. Our solutions help students to understand the concepts in a much better way and to prepare well for the examinations.

NCERT Solutions of Science for Class 8, provided here, presents you with answers to the textbook questions along with extra questions, exemplary problems, worksheets, MCQs and short answering questions. Solving these questions will help you to prepare notes and to understand the concept thoroughly.

If you have trouble understanding a topic related to Science, you can verify the answers to the questions given at the end of each topic of the CBSE Class 8  Science book. BYJU’S provides CBSE Class 8 Science Solutions in PDF format, which can be accessed and downloaded easily from anywhere and at any time.

Chapter-wise NCERT Class 8 Science Solutions

The following chapters have been removed from the NCERT Class 8 Science textbook 2023-24.

Features of NCERT Solutions of Science for Class 8

• These solutions include chapter-wise & exercise-wise solutions to Class 8 Science textbook questions
• The solutions are easy to understand and are provided in simple words.
• Diagrams are included for better understanding.
• CBSE Class 8 Science Solutions are given in a step-by-step manner to help students understand each concept easily.

NCERT Class 8 Science Solutions Chapter Brief:

Chapter 1: crop production and management.

This chapter has been included to make students understand how food is being produced through agricultural practices. Further, this chapter elaborates that crops are mainly categorised into two types in India based on the season, i.e. Rabi and Kharif. The basic practices of crop production include the following points, which are explained in detail in this chapter.

• Preparation of soil
• Adding manure and fertilisers
• Protecting from weeds

Moreover, the traditional and modern method of irrigation has been explained. In the end, a short brief on animal husbandry is described.

Also, access the following resources for Class 8 Chapter 1 Crop Production and Management, at BYJU’S:

• Crop Production and Management Class 8 Notes
• NCERT Exemplar Class 8 Science Solutions for Chapter 1 – Crop Production and Management
• Important Questions of Class 8 Science Chapter 1- Crop Production and Management

Chapter 2: Microorganisms – Friend and Foe

NCERT Class 8 Science Chapter 2 starts with the definition of microorganisms, and then its concepts have been explained with the help of 2 activities. After that, it has been explained how microorganism plays an important role in our lives through various examples:

• Making of curd and bread
• Commercial use of microorganisms
• Use of microorganisms in medicines
• Increasing soil fertility

After this, it has also been explained that microorganism is harmful and can cause various diseases in humans, animals and plants. Food poisoning is caused due to these harmful microorganisms. Further in this chapter, different methods of food preservation have been explained. The chapter ended with the nitrogen fixation and nitrogen cycle which is described by a diagram.

Also, access the following resources for Class 8 Chapter 2 Microorganisms – Friend and Foe, at BYJU’S:

• Microorganisms Class 8 Notes
• NCERT Exemplar Class 8 Science Solutions for Chapter 2 – Microorganisms Friend and Foe

Chapter 3: Synthetic Fibres and Plastics

Chapter 3 of NCERT Class 8 Science book describes synthetic fibres and their types (rayon, nylon, polyester and acrylic). Along with this, the characteristics of synthetic fibres are explained in detail. Then, the chapter introduces students to plastics, their properties and effect on the environment.

Also, access the following resources for Class 8 Chapter 3 Synthetic Fibres and Plastics, at BYJU’S:

• Synthetic Fibres and Plastics Class 8 Notes
• Important Questions for Class 8 Science Chapter 3: Synthetic Fibres and Plastics
• NCERT Exemplar Class 8 Science Solutions for Chapter 3 – Synthetic Fibres and Plastics

Chapter 4: Materials – Metals and Non-Metals

NCERT Class 8 Science Chapter 4 describes the physical and chemical properties of metals and non-metals . To explain these properties in a better way, activities are included in the NCERT book. In the end, the uses of metals and non-metals are explained.

Also, access the following resources for Class 8 Chapter 4 Materials: Metals and Non-Metals, at BYJU’S:

• Materials Metals and Non-metals Class 8 Notes
• Important Questions for Class 8 Science Chapter 4 – Materials Metals and Non-Metals
• NCERT Exemplar Class 8 Science Solutions for Chapter 4 – Materials Metals and Non Metals

Chapter 5: Coal and Petroleum

This chapter talks about natural resources and their classification. It explains that coal, petroleum and natural gas are fossil fuels that are formed from the dead remains of living organisms millions of years ago. Then, it describes how coke, coal tar and coal gas are formed from coal. This chapter also describes the refining of petroleum. Further, the concept of natural gas is explained. The chapter ends by making students aware that natural resources are limited, so we should use them wisely.

Also, access the following resources for Class 8 Chapter 5 Coal and Petroleum, at BYJU’S:

• Coal and Petroleum Class 8 Notes – Chapter 5
• Important Questions for Class 8 Science Chapter 5 – Coal and Petroleum
• NCERT Exemplar Class 8 Science Solutions for Chapter 5 – Coal and Petroleum

Chapter 6: Combustion and Flame

In this chapter, students will study combustion and its different types. It has been beautifully explained with the help of activities. The measures to control the fire are mentioned. After this, the concept of flame and the structure of flame is explained. The chapter ends with the topic of fuel, fuel efficiency and the harmful effects of burning fuel.

Also, access the following resources for Class 8 Chapter 6 Combustion and Flame, at BYJU’S:

• Combustion and Flames Class 8 Notes – Chapter 6
• Important Questions for Class 8 Science Chapter 6 – Combustion and Flame
• NCERT Exemplar Class 8 Science Solutions for Chapter 6 – Combustion and Flame

Chapter 7: Conservation of Plants and Animals

This chapter puts emphasis on deforestation and its cause, the consequences of deforestation, and how to conserve forests and wildlife. Further, it explains about Biosphere reserve, flora and fauna, endemic species, wildlife sanctuary, national park, red data book, migration, recycling of paper and at the end, reforestation.

Also, access the following resources for Class 8 Chapter 7 Conservation of Plants and Animals, at BYJU’S:

• Conservation of Plants and Animals Class 8 Notes
• Important Questions for Class 8 Science Chapter 7 – Conservation of Plants and Animals
• NCERT Exemplar Class 8 Science Solutions for Chapter 7 – Conservation of Plants and Animals

Chapter 8: Cell – Structure and Functions

In Chapter 8, students will get to know that the cell is the smallest living part of an organism. They will learn that cells exhibit a variety of shapes and sizes and the number of cells varies from organism to organism. The cell structure and function are described. The different parts of the cell are explained in detail:

• Cell Membrane

The chapter ends with a comparison of plants and animal cells.

Also, access the following resources for Class 8 Chapter 8 Cell – Structure and Functions, at BYJU’S:

• Cell – Structure and Function Class 8 Notes
• NCERT Exemplar Class 8 Science Solutions for Chapter 8 – Cell Structure and Functions

Chapter 9: Reproduction in Animals

In this chapter, students will study that there are two modes of reproduction, i.e. sexual and asexual reproduction, through which animals reproduce. The topic of sexual reproduction is described in detail, where students will get familiar with the male reproductive organs, female reproductive organs, fertilisation, development of the embryo, and viviparous and oviparous animals. At the end of this chapter, asexual reproduction is explained.

Also, access the following resources for Class 8 Chapter 9 Reproduction in Animals, at BYJU’S:

• Reproduction in Animals Class 8 Notes – Chapter 9
• Important Questions for Class 8 Science Chapter 9 – Reproduction in Animals
• NCERT Exemplar Class 8 Science Solutions for Chapter 9 – Reproduction in Animals

Chapter 10: Reaching the Age of Adolescence

NCERT Class 8 Science Chapter 10, students will learn the role of hormones that bring change in the human body and transform a child into an adult. The chapter starts with an explanation of adolescence and puberty. Then, the changes introduced during puberty are explained:

• Increase in height
• Change in body shape
• Voice change
• Increased activity of sweat and sebaceous glands
• Development of sexual organs
• Reaching mental, intellectual and emotional maturity

The chapter further explains the topics of secondary sexual characters, the role of hormones in initiating reproductive function, the reproductive phase of life in humans, sex determination , other hormones except for sex hormones, the role of hormones in completing the life history of insects and frogs, and reproductive health.

Also, access the following resources for Class 8 Chapter 10 Reaching the Age of Adolescence, at BYJU’S:

• Reaching the Age of Adolescence Class 8 Notes- Chapter 10
• Important Questions for Class 8 Science Chapter 10 – Reaching the Age of Adolescence
• NCERT Exemplar Class 8 Science Solutions for Chapter 10 – Reaching the Age of Adolescence

Chapter 11: Force and Pressure

This chapter is an important part of Physics. Students will find this chapter interesting as lots of activities are given to explain the concepts. It explains how a force arises from the interaction of two objects. Then, it explains that force can be a push or a pull. It can change the state of motion or shape of an object. Then the topics such as contact forces, non-contact forces, pressure, the pressure exerted by liquids and gases, atmospheric pressure are elaborated in detail.

Also, access the following resources for Class 8 Chapter 11 Force and Pressure, at BYJU’S:

• Force and Pressure Class 8 Notes – Chapter 11
• Important Questions for Class 8 Science Chapter 11 – Force and Pressure
• NCERT Exemplar Class 8 Science Solutions for Chapter 11 – Force and Pressure

Chapter 12: Friction

This chapter talks about the force of friction , factors affecting friction, and how friction can be increased and reduced. At the end of this chapter, the topic of fluid friction is described.

Also, access the following resources for Class 8 Chapter 12 Friction, at BYJU’S:

• Friction Class 8 Notes – Chapter 12
• NCERT Exemplar Class 8 Science Solutions for Chapter 12 – Friction

Chapter 13: Sound

Sound plays an important role in human lives by helping us to communicate with each other. Here, in this chapter, students will get all answers related to sound, such as how sound produces, how it travels, how we hear the sound, and why some sounds are louder.

Also, access the following resources for Class 8 Chapter 13 Sound, at BYJU’S:

• Sound Class 8 Notes – Chapter 13
• Important Questions for Class 8 Science Chapter 13 – Sound
• NCERT Exemplar Class 8 Science Solutions for Chapter 13 – Sound

Chapter 14: Chemical Effects of Electric Current

This chapter explains that some liquids are good conductors of electricity, and some are poor conductors of electricity . Further, it elaborates on the topic of “chemical effects of electric current” and electroplating.

Also, access the following resources for Class 8 Chapter 14 Chemical Effects of Electric Current, at BYJU’S:

• Chapter 14 Chemical Effects of Electric Current Class 8 Notes
• Important Questions for Class 8 Science Chapter 14 – Chemical Effects of Electric Current
• NCERT Exemplar Class 8 Science Solutions for Chapter 14 – Chemicals Effects of Electric Current

Chapter 15: Some Natural Phenomena

This chapter discusses destructive natural phenomena, i.e. lighting and earthquakes. At the end of the chapter, steps to minimise the destruction from these natural phenomena are also explained. This chapter has been added so that students become aware of such natural phenomena and protect themselves from such situations.

Also, access the following resources for Class 8 Chapter 15 Some Natural Phenomena, at BYJU’S:

• Some Natural Phenomena Class 8 Notes – Chapter 15
• Important Questions for Class 8 Science Chapter 15 – Some Natural Phenomena
• NCERT Exemplar Class 8 Science Solutions for Chapter 15 – Some Natural Phenomena

Chapter 16: Light

The world is full of colours and beautiful things. This chapter will let us know that through the light, we are able to see the things around us. This chapter explains the law of reflection , regular and diffused reflection, and multiple reflections. It also describes that sunlight is known as white light, and it consists of 7 colours. The splitting of light into its constituent colours is known as dispersion. The human eye is explained with a diagram. In the end, the chapter explains how we should take care of our eyes and how visually impaired people can read and write.

Also, access the following resources for Class 8 Chapter 16 Light, at BYJU’S:

• Light Class 8 Notes – Chapter 16
• Important Questions for Class 8 Science Chapter 16 – Light
• NCERT Exemplar Class 8 Science Solutions for Chapter 16 – Light

Chapter 17: Stars and the Solar System

This chapter talks about celestial objects, the moon, stars and constellations. After this, the solar system was described along with the features of each planet included in the solar system . Then some other members of the solar system are also described, which includes asteroids, comets, meteors and meteorites, and artificial satellites.

Also, access the following resources for Class 8 Chapter 17 Stars and the Solar System, at BYJU’S:

• Stars and the Solar System Class 8 Notes – Chapter 17
• Important Questions for Class 8 Science Chapter 17 – Stars and the Solar System
• NCERT Exemplar Class 8 Science Solutions for Chapter 17 – Stars and the Solar System

Chapter 18: Pollution of Air and Water

This chapter makes us aware of the harmful changes that are taking place in our surroundings due to air and water pollution and its effect on human lives. The chapter starts with air pollution and how air gets polluted. Then it describes the impact of air pollution on the Taj Mahal. Further, the concept of the greenhouse effect and methods to reduce air pollution are explained. After this, the chapter discusses water pollution and how water gets polluted. In the end, it describes the method through which water is purified and water pollution can be controlled.

Also, access the following resources for Class 8 Chapter 18 Pollution of Air and Water, at BYJU’S:

• Pollution of Air And Water Class 8 Notes – Chapter 18
• Important Questions for Class 8 Science Chapter 18 – Pollution of Air and Water
• NCERT Exemplar Class 8 Science Solutions for Chapter 18 – Pollution of Air And Water

Tips to Ace CBSE Class 8 Exams

• Get well-versed with the syllabus before starting exam preparation
• Be aware of the test format, number and type of questions the exam includes.
• The daily assignments, notes, and hand-outs are indicators of the pattern of your teacher’s thinking. From there, you can analyse the important points and determine the question types.
• Study every day to understand the topic and to clear the doubts.
• While studying, break down big concepts into smaller chunks. Test yourself after studying each topic.
• Do not ignore easy concepts. This leads to errors in the examination, which result in losing marks.
• Before you take the test, do not forget to give yourself a quick review. This will give you confidence and ensure that the topics are fresh in your mind.

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Class 8 Science Assignments

We have provided below free printable Class 8 Science Assignments for Download in PDF. The Assignments have been designed based on the latest NCERT Book for Class 8 Science . These Assignments for Grade 8 Science cover all important topics which can come in your standard 8 tests and examinations. Free printable Assignments for CBSE Class 8 Science , school and class assignments, and practice test papers have been designed by our highly experienced class 8 faculty. You can free download CBSE NCERT printable Assignments for Science Class 8 with solutions and answers. All Assignments and test sheets have been prepared by expert teachers as per the latest Syllabus in Science Class 8. Students can click on the links below and download all Pdf Assignments for Science class 8 for free. All latest Kendriya Vidyalaya Class 8 Science Assignments with Answers and test papers are given below.

Science Class 8 Assignments Pdf Download

We have provided below the biggest collection of free CBSE NCERT KVS Assignments for Class 8 Science . Students and teachers can download and save all free Science assignments in Pdf for grade 8th. Our expert faculty have covered Class 8 important questions and answers for Science as per the latest syllabus for the current academic year. All test papers and question banks for Class 8 Science and CBSE Assignments for Science Class 8 will be really helpful for standard 8th students to prepare for the class tests and school examinations. Class 8th students can easily free download in Pdf all printable practice worksheets given below.

Topicwise Assignments for Class 8 Science Download in Pdf

Advantages of Class 8 Science Assignments

• As we have the best and largest collection of Science assignments for Grade 8, you will be able to easily get full list of solved important questions which can come in your examinations.
• Students will be able to go through all important and critical topics given in your CBSE Science textbooks for Class 8 .
• All Science assignments for Class 8 have been designed with answers. Students should solve them yourself and then compare with the solutions provided by us.
• Class 8 Students studying in per CBSE, NCERT and KVS schools will be able to free download all Science chapter wise worksheets and assignments for free in Pdf
• Class 8 Science question bank will help to improve subject understanding which will help to get better rank in exams

Frequently Asked Questions by Class 8 Science students

At https://www.cbsencertsolutions.com, we have provided the biggest database of free assignments for Science Class 8 which you can download in Pdf

We provide here Standard 8 Science chapter-wise assignments which can be easily downloaded in Pdf format for free.

You can click on the links above and get assignments for Science in Grade 8, all topic-wise question banks with solutions have been provided here. You can click on the links to download in Pdf.

We have provided here topic-wise Science Grade 8 question banks, revision notes and questions for all difficult topics, and other study material.

We have provided the best collection of question bank and practice tests for Class 8 for all subjects. You can download them all and use them offline without the internet.

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NCERT Solutions for Class 8 Science english medium

NCERT Solutions for Class 8 Science in english medium. Well illustrated example and easy solution for ncert book Class 8 Science english medium . Students who searching the NCERT Solutions online in hindi medium Apurva Institute is the one of the best solutions for ncert books for class 8 Science in english medium .

If you searching for ncert solutions for class 8 Science chapter 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 etc question answer you can find it on the same page and same article also class 8 Science all chapters and exercise question answer with well illustared and explained ncert solutions for class 8 Science in hindi medium also ncert solutions for class 8 Science hindi medium. As we discuss this for well solution and easy language for class 8 ncert Science solutions in hindi.

अब हिंदी माध्यम में 8 वीं कक्षा का Science विषय पढ़े और एन. सी. ई. आर. टी. पुस्तकों का आसान भाषा में हल पाएं | इस पुस्तक के पाठ हैं:- 1. Crop Production And Management , 2. Microorganisms : Friend And Foe , 3. Synthetic Fibres And Plastics , 4. Materials : Metals And Non-Metals , 5. Coal And Petroleum , 6. Combustion And Flame , 7. Conservation of Plants And Animals , 8. Cell - Structure and functions , 9. Reproduction in animals , 10. Reaching the age of adolescence , 11. Force And Pressure , 12. Friction , 13. Sound , 14. Chemical Effects of Electric Current , 15. Some Natural Phenomena , 16. Light , 17. Stars And The Solar System , 18. Pollution of Air and Water ,

NCERT Solutions for Class 8 Science in english Medium

English medium अंग्रेजी माध्यम.

1. 1. Crop Production And Management

2. 2. Microorganisms : Friend And Foe

3. 3. Synthetic Fibres And Plastics

4. 4. Materials : Metals And Non-Metals

5. 5. Coal And Petroleum

6. 6. Combustion And Flame

7. 7. Conservation of Plants And Animals

8. 8. Cell - Structure and functions

9. 9. Reproduction in animals

10. 10. Reaching the age of adolescence

11. 11. Force And Pressure

12. 12. Friction

13. 13. Sound

14. 14. Chemical Effects of Electric Current

15. 15. Some Natural Phenomena

16. 16. Light

17. 17. Stars And The Solar System

18. 18. Pollution of Air and Water

Free NCERT Solutions for Class 8 Science in English Medium - Apurva provides cbse Study materials of NCERT Solutions Class 8 ncert solutions all chapters in english medium. Science ncert solution for clss 8 in english, class 8 Science solutions, Science class 8 ncert solutions, class 8 ncert book solution, class 8 ncert Science solutions, class 8, ncert solution

Latest CBSE examination Based English Grammar

English grammar is the one of the best subject for students where they learn about noun pronoun adjective adverb conjuction interjection modals tense active and passive voice narration and clauses. latest examination based english grammar topics for cbse examination.

Topics covered in this section of English grammar are like noun, pronoun, adjective, adverb, conjuction, interjection, modals, tense, active, and, passive, voice, narration, preposition, auxilary verbs, helping verbs, question tag, removal of too, mood, determiners, and clauses

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NCERT Solutions for Class 8 Science in English Medium - Apurva

Our NCERT Solutions are categorised into four sections e.g (i) Chapter review (Quick revision Notes) (ii) NCERT Textbook (Intext) Exercise with Answer (iii) Pure NCERT Solution exercise (iv) Extra and important questions with answers

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Ncert solutions for class 8 science.

NCERT is on the priority list of recommendation of the Central Board of Secondary Education (CBSE). Here, you will find all the chapter-wise NCERT Solutions for Class 8 Science. It will help you to understand the subject and perform well in exams.

In CBSE Class 8, Science is divided into 3 parts – Physics, Chemistry, and Biology

Physics, a component of science is generally seen as one of the most difficult subjects due to the presence of a large number of practical questions. But the days are gone, when physics used to haunt students because here at Toppr, we have brought NCERT solutions for all the questions of all chapters.

Chemistry is one of those subjects which are equally important from academics as well practical point of view. NCERT is specially made to clear most of the topics of the syllabus of chemistry. NCERT solutions help the students to clear all the doubts regarding any chapter. Here, you will find all the solutions of NCERT questions.

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CBSE Class 8 Science NCERT Solutions Chapter-wise

• Chapter 1 – Crop Production and Management
• Chapter 2 – Microorganisms: Friend and Foe
• Chapter 3 – Synthetic Fibres and Plastics
• Chapter 4 – Materials: Metals and Non-metals
• Chapter 5 – Coal and Petroleum
• Chapter 6 – Combustion and Flame
• Chapter 7 – Conservation of Plants and Animals
• Chapter 8 – Cell – Structure And Functions
• Chapter 9 – Reproduction in Animals
• Chapter 10 – Reaching the Age of Adolescence
• Chapter 11 – Force and Pressure
• Chapter 12 – Friction
• Chapter 13 – Sound
• Chapter 14 – Chemical Effects of Electric Current
• Chapter 15 – Some Natural Phenomena
• Chapter 16 – Light
• Chapter 17 – Stars and Solar System
• Chapter 18 – Pollution of Air and Water

NCERT Solutions for Class 8 Chemistry Chapter-wise

Ncert solutions for class 8 science chapter 1 – crop production and management.

This chapter involves the study of yields and their respective administration. It also highlights various harvests, different climatic conditions, etc. Moreover, the type of nourishment is also stated in the chapter with respect to different crops. Gathering and capacity are also highlighted in this chapter.

NCERT Solutions for Class 8 Science Chapter 2 – Microorganisms: Friend and Foes

There are various types of microorganisms present on this planet. They all have their own characteristics. After completing this chapter, the students will be able to answers questions like Where do microorganisms live?

NCERT Solutions for Class 8 Science Chapter 3 – Synthetic Fibres and Plastics

This chapter states the meaning of artificial synthetic fibers and plastics which are largely used in our daily life for many purposes. Moreover, it will explain the types of synthetic fibers and plastics along with characteristics of both. Moreover, the chapter puts the concept of the environment along with the application or usage of such materials.

NCERT Solutions for Class 8 Science Chapter 4 – Materials: Metals and Non-Metals

Materials include two major segments viz. Metals and Non-Metals. This chapter will unveil the world of metals and non-metals by explaining their properties and applications. After studying this chapter, the students will be able to classify the components into metals and non-metals considering their respective property along with the respective uses of metals and non-metals.

NCERT Solutions for Class 8 Science Chapter 5 – Coal and Petroleum

Coal and Petroleum are one of the largest used energy resources in any country. Though with the passage of time, their use is diminishing due to a movement towards conventional sources of energy. This chapter helps the students to know the Natural Gas as an asset and how it is being depleted due to high usage. Moreover, the students will be confronted with the term ‘Fossil Fuels’. Towards the end, it puts the topics of ill-effects of fossil fuels on the environment also.

NCERT Solutions for Class 8 Science Chapter 6 – Combustion and Flame

This chapter tries to explain the types of fuels being used in different work and places like at home, in vehicles, in factories, etc. Different sources of powers like Cow dung, coal, wood, charcoal, diesel, CNG, etc. are also highlighted. Use of flame becomes an important part of the discussion. Moreover, the students will come to know about the difference in the implications of burning different types of fuels. Detailed differentiation between the consuming of a flame and consuming of fuel is also stated in between the chapter.

NCERT Solutions for Class 8 Science Chapter 7 – Conservation of Plants and Animals

Conservation of Plant and Animals is a complex chapter to study. This chapter states the different human activities which are affecting the life of Plants and Animals along the various means to conserve them.

NCERT Solutions for Class 8 Science Chapter 8 – Cell: Structure and Functions

In general, cells are of two types – Plant Cell and Animal Cell. There are different characteristics of both of them making them different on various grounds. Moreover, the chapter talks about the discovery of the cell, its properties, and composition.

NCERT Solutions for Class 8 Science Chapter 9 – Reproduction in Animals

Continuation of any species completely depends on the process of reproduction. This chapter specifies how various animals reproduce. Various modes and procedures of reproduction are explained in detail in this chapter for a better understanding of the students.

NCERT Solutions for Class 8 Science Chapter 10 – Reaching the Age of Adolescence

Adolescence is the time period in any person’s life in which he/she undergoes various changes both physically and mentally. This chapter shows the changes in the various organs during this period and the role of hormones. Moreover, students will come to know about the conceptive organs of the body.

NCERT Solutions for Class 8 Science Chapter 11 – Force and Pressure

Force and pressure are the most important concept in physics form theoretical as well as practical means. After studying this chapter, the students will be able to understand the future complex problems.

NCERT Solutions for Class 8 Science Chapter 12 – Friction

Backing or the opposition power or force constitutes Friction. It has become an essential part of today’s education system. This chapter allows the students to know about the application of friction in everyday life. In this chapter, students will find many diagrams and images for a better understanding of the topic.

NCERT Solutions for Class 8 Science Chapter 13 – Sound

In the initial stage of the chapter, the chapter talks about the distinction between music and noise. Later, the chapter starts to focus on Noise Pollution showing its impact on the environment. Moreover, it highlights certain means to minimize the noise in the environment. A better understanding of the topic will help the students to gain much knowledge about this topic in the future.

NCERT Solutions for Class 8 Science Chapter 14 – Chemical Effects of Electric Current

This chapter tries to move forward with the concept of nature of element and its relation with the current flow. Moreover, it analyses the behavior of various materials with respect to current flow. It provides a detailed analysis of the passing of electricity through conductors and insulators.

NCERT Solutions for Class 8 Science Chapter 15 – Some Natural Phenomena

Moving a little away from general science topics, this chapter talks about the concept of lightning and earthquakes. It also discusses the related concepts like the magnitude of earthquake and lightning, the reasons behind both of them, etc.

NCERT Solutions for Class 8 Science Chapter 16 – Light

Everyone knows that the speed of light is the fastest. In this chapter, students will come to know about the various properties and application of light. Towards the end, the chapter also talks about the Braille system used by the visually-impaired people.

NCERT Solutions for Class 8 Science Chapter 17 – Stars and the Solar System

There are various celestial bodies in the solar system. This chapter helps the students to learn about various celestial bodies like the moon. Moreover, we would learn about the properties of such bodies.

NCERT Solutions for Class 8 Science Chapter 18 – Pollution of Air and Water

Anything that contaminates the purity of a substance, that particular element is known as ‘Pollutant’. In this chapter, the students would be able to know about the pollutants of air pollution and water pollution. The chapter ends with various suggestions to avoid such pollutants.

Solved Questions for You

Question 1: Explain why some fibres are called synthetic.

Answer: Some fibres are called synthetic because they are not made from natural fibres. Instead, they are made by chemical processing of petrochemicals. The synthetic fibres are made up of very large units called polymers. Some of the synthetic fibres are – nylon, rayon, acrylon.

Question 2: Define adolescence.

Answer: Adolescence is the biological processes drive many aspects of growth and development, with the onset of puberty marking the transition from childhood to adolescence. Puberty is the transitional period  between childhood and adulthood, during which growth of the body occurs, secondary sexual characters appears, fertility is achieved and profound physiological changes takes place. The normal range of onset is ages 8 to 14 in females and ages 9 to 15 in males.

Question 3: Explain how you can take care of your eyes.

Answer: Eyes are very sensitive organ of the human body and should be taken care of.

The following steps should be followed to take care of your eyes:

• Have a regular checkup with the eye specialist. If advised, use spectacles of proper power after an eye test.
• Do not rub your eyes. If there is irritation or dust particles enter your eyes, wash them with clean water.
• Regularly wash your eyes with clean water.
• Do not read a book too close or too far from the eye as it causes stress.
• Have a proper diet. Eat food items rich in vitamin A like raw carrots, broccoli and eggs.
• Avoid overexposure(example looking at sun) or underexposure(example reading in dark) of light to the eye.

Question 4: Explain how deforestation leads to reduced rainfall.

Answer:   Plants and water bodies are the sources of most of the moisture and water vapour that constitutes the clouds that bring rain (in continental regions). Forests act as large transpiration zones and contribute greatly to the atmospheric moisture. In their absence, the water of the soil just seeps down or flows away and thus they cannot contribute to rain.

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NCERT Solutions for Class 8

• NCERT Solutions for Class 8 Chemistry Chapter 3 Free PDF Download
• NCERT Solutions for Class 8 Chemistry Chapter 4 Free PDF Download
• NCERT Solutions for Class 8 Chemistry Chapter 5 Free PDF Download
• NCERT Solutions for Class 8 Physics Chapter 11 Free PDF Download
• NCERT Solutions for Class 8 Physics Chapter 16 Free PDF Download
• NCERT Solutions for Class 8 Physics Chapter 13 Free PDF Download
• NCERT Solutions for Class 8 History Chapter 3 Free PDF Download
• NCERT Solutions for Class 8 History Chapter 2 Free PDF Download
• NCERT Solutions for Class 8 History Chapter 6 Free PDF Download
• NCERT Solutions for Class 8 Science Cell Chapter 8 Free PDF Download

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