NCERT Solutions for Class 8 Science
NCERT Solutions for Class 8 Science is an extremely 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 you in understanding the concepts in a much better way and to prepare for the examinations.
NCERT Solution of Science for Class 8 provided here present 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 in understanding a topic related to Science, you can verify the answers to the questions given at the end of each topic of 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.
Chapterwise NCERT Class 8 Science Solutions
Chapter 1 Crop Production and ManagementChapter 2 Microorganisms: Friend and FoeChapter 3 Synthetic Fibres and PlasticsChapter 4 Materials: Metals and Non-MetalsChapter 5 Coal and PetroleumChapter 6 Combustion and FlameChapter 7 Conservation of Plants and AnimalsChapter 8 Cell – Structure and FunctionsChapter 9 Reproduction in AnimalsChapter 10 Reaching the Age of AdolescenceChapter 11 Force and PressureChapter 12 FrictionChapter 13 SoundChapter 14 Chemical Effects of Electric CurrentChapter 15 Some Natural PhenomenaChapter 16 LightChapter 17 Stars and the Solar SystemChapter 18 Pollution of Air and Water
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 the food is being produced through agricultural practices. Further, this chapter elaborates that crops are mainly categorized 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
- Sowing
- Adding manure and fertilizers
- Irrigation
- Protecting from weeds
- Harvesting
- Storage
Moreover, the traditional and modern method of irrigation has been explained. At the end, short brief on animal husbandry is described.
Chapter 2: Microorganisms – Friend and Foe
NCERT Class 8 Science Chapter 2 starts with the definition of microorganism 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 microorganism
- Use of microorganism in medicines
- Vaccine
- Increasing soil fertility
After this, it has also been explained that microorganism is harmful and can cause various diseases to 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.
Chapter 3: Synthetic Fibres and Plastics
Chapter 3 of NCERT Class 8 Science book describes the synthetic fibres and its type (rayon, nylon, polyester and acrylic). Along with this, the characteristics of synthetic fibres are explained in detail. Then, the chapter introduces students to plastics, its properties and effect of it in the environment.
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. At the end uses of metals and non-metals are explained.
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 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.
Chapter 6: Combustion and Flame
In this chapter, students will study about 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 structure of flame is explained. The chapter ends with the topic of fuel, fuel efficiency and harmful effects of burning the fuel.
Chapter 7: Conservation of Plants and Animals
This chapter put emphasis on deforestation and its cause, consequences of deforestation, 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.
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 a number of cells vary from organism to organism. The cell structure and function is described. The different parts of the cell are explained in detail:
- Cell Membrane
- Cytoplasm
- Nucleus
The chapter ends with the comparison of plants and animal cells.
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, fertilization, development of the embryo, viviparous and oviparous animal. At the end of this chapter, asexual reproduction is explained.
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 the 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, 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, reproductive health.
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.
Chapter 12: Friction
This chapter talks about the force of friction, factors affecting friction, how friction can be increased and reduced. At the end of this chapter, the topic of fluid friction is described.
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 sound, why some sounds are louder.
Chapter 14: Chemical Effects of Electric Current
This chapter explains that some liquids are a good conductor of electricity and some are a poor conductor of electricity. Further, it elaborates the topic of “chemical effects of electric current” and electroplating.
Chapter 15: Some Natural Phenomena
This chapter will discuss the destructive natural phenomena i.e lighting and earthquakes. At the end of the chapter steps to minimize the destruction from these natural phenomena is also explained. This chapter has been added so that students become aware of such natural phenomena and protect themselves from such situations.
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, multiple reflections. It also describes that sunlight is known as white light and it consists of 7 colours. 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.
Chapter 17: Stars and The Solar System
This chapter talks about the celestial objects, the moon, stars and constellations. After this, the solar system has been 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, artificial satellites.
Chapter 18: Pollution of Air and Water
This chapter makes us aware of the harmful changes that are taking place in our surrounding 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 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. At the end, it describes the method through which water is purified and water pollution can be controlled.
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 the questions the test includes.
- The daily assignments, notes, 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.