CBSE Class 8 Science Revision Notes

CBSE Class 8 Science revision notes should be used by students to strengthen their conceptual understanding. Class 8 Science CBSE syllabus introduces various new concepts to the students such as the cell structure, properties of metals and non-metals, force and pressure, friction, sound, fibres and plastics, and light. But, many students develop a habit of cramming the topics without giving much thought to understanding the basics. This might help them achieve good marks in Class 8 but leaves them with no knowledge. As a result, they face study issues in higher classes.

Class 8 Science revision notes by askIITians help students in understanding every concept of the CBSE syllabus thoroughly. These notes are detailed, clear, easy to understand, and pointwise which makes it easier for the students to learn the concepts. Students can use these notes at any time while studying the chapter, preparing for exams, or revising the chapter before the exam. With our online CBSE revision notes for Class 8 Science, one can revise the chapters in just 20 minutes or less and brush up on all the topics.

Online Revision Notes for CBSE Class 8 Science | Chapter 1 to 18

We have provided chapter-wise notes for CBSE Class 8 Science. These notes are based on the latest CBSE Class 8 Science syllabus that includes 18 chapters. You can study the notes chapter-wise and prepare for your exams without any confusion. The revision notes are free for all the students.

Free Revision Notes for CBSE Class 8 Science Chapter 1 – Crop Production and Management

The first chapter of CBSE Class 8 Science is about the production of food and its storage. You will learn about various agricultural practices in this chapter. The Science revision notes for CBSE Class 8 Chapter 1 include definitions for all the topics of the chapter such as preparation of the soil for crop production, the sowing method, manures, fertilisers, irrigation methods, harvesting of crops, protecting crops from weeds, and storage of crops.

Free Revision Notes for CBSE Class 8 Science Chapter 2 – Microorganisms: Friend and Foe

Do you know that microorganisms play an important role in our environment? Online revision notes for Chapter 2 of CBSE Class 8 Science will help you understand everything about it. The main topics of this chapter include how microorganisms help in making curd and bread, how microorganisms are used commercially, how microorganisms increase soil fertility and the use of microorganisms in medicine. Revise every concept of this chapter with our CBSE revision notes.

Free Revision Notes for CBSE Class 8 Science Chapter 3 – Synthetic Fibres and Plastics

You must have heard that plastics are bad for the environment. This chapter will teach you all about it. You must refer to our online free revision notes for CBSE Class 8 Science Chapter 3 and revise topics like synthetic fibres and their types, characteristics of synthetic fibres, properties of plastics and how plastics affect the environment.

Free Revision Notes for CBSE Class 8 Science Chapter 4 – Materials: Metals and Non-Metals

This chapter of CBSE Class 8 Science helps you understand the various properties of metals and non-metals. Our online revision notes for this chapter will help you understand the physical and chemical properties of metals and non-metals, displacement reactions, oxides of metals, reactivity series, the reaction of metals and non-metals, extraction of metals, and ionic compounds.

Free Revision Notes for CBSE Class 8 Science Chapter 5 – Coal and Petroleum

This chapter helps you understand how natural resources are important for us and how fast they are depleting from the environment. The revision notes for CBSE Class 8 Science Chapter 5 help you understand topics like the formation of coal, petroleum and natural gas, refining of petroleum, types of coal, extraction of oil, and shortage of petroleum and its conservation.

Free Revision Notes for CBSE Class 8 Science Chapter 6 – Combustion and Flame

In this chapter, you will learn what combustion is and its types. The CBSE revision notes by askIITians for this chapter include all the definitions about combustible and non-combustible substances, candle flame, the structure of the candle flame, types of combustion, pollution, global warming, and CNG.

Free Revision Notes for CBSE Class 8 Science Chapter 7 – Conservation of Plants and Animals

This chapter teaches you how we must protect plants and animals and save our planet. It is an important chapter that teaches you the reality of what is happening to our environment. The CBSE revision notes for Class 8 Science Chapter 7 by askIITians help you understand all the concepts of this chapter such as deforestation, causes of deforestation, conservation of forests and wildlife, biosphere reserve, flora and fauna, wildlife sanctuary, national park, red data book, migration, recycling of paper and reforestation.

Free Revision Notes for CBSE Class 8 Science Chapter 8 – Cell – Structure and Functions

In this chapter, you will learn about cells, their structure and their functions. The revision notes for CBSE Class 8 Science Chapter 8 include definitions, diagrams and explanations for all topics of the chapter. These include the different cell organelles, prokaryotic and eukaryotic cells, nucleus, chromosomes, DNA, and plastids. This chapter’s main objective is to help you understand the differences between plant cells and animal cells.

Free Revision Notes for CBSE Class 8 Science Chapter 9 – Reproduction in Animals

In this chapter, you will learn about different types of asexual reproduction like fission, budding, cell division, mitosis, meiosis, and also about sexual reproduction. This includes the male and the female reproductive systems and some important terms. The revision notes for this chapter give you all the required information that will help you understand all the concepts of the chapter thoroughly.

Free Revision Notes for CBSE Class 8 Science Chapter 10 – Reaching The Age of Adolescence

This is another chapter that is very important from your daily life perspective and helps you understand how changes occur in our bodies at the age of adolescence. The main topics of this chapter include how hormones bring change in the human body, different changes during puberty such as a change in voice, increase in height, change in body shape, increased activity of sweat glands, and reaching mental, emotional and intellectual maturity. All the topics of this chapter are explained in our online CBSE revision notes.

Free Revision Notes for CBSE Class 8 Science Chapter 11 – Force and Pressure

This chapter introduces you to the concept of force and pressure. The CBSE free revision notes for Class 8 Science Chapter 11 include explanations for all topics of this chapter. They include force, how force is produced, how force can change the state of motion of an object, contact and noncontact forces, pressure, pressure exerted by gases and liquids, atmospheric pressure and more.

Free Revision Notes for CBSE Class 8 Science Chapter 12 – Friction

In this chapter, you will learn all about the force of friction. It is an important concept for daily life as well as for higher studies. The CBSE online revision notes for Class 8 Science Chapter 12 by askIITians include all the definitions and diagrams for the chapter. These include topics like a force of friction, relative motion, causes of friction, plowing effect, factors affecting friction, calculating friction force using the spring balance, normal force, static friction, kinetic friction, rolling friction, and drag force.

Free Revision Notes for CBSE Class 8 Science Chapter 13 – Sound

We all know that sound helps us in communication. But how is the sound produced and propagated? You will learn all about it in this chapter. Our revision notes for CBSE Class 8 Sound chapter include topics like introduction to sound waves, transverse and longitudinal waves, sound properties, how humans produce sound, the human ear, amplitude, time period, frequency of sound, loudness and pitch of the sound, audible and inaudible sound, noise pollution, and how to control noise pollution.

Free Revision Notes for CBSE Class 8 Science Chapter 14 – Chemical Effects of Electric Current

This chapter teaches you about how some materials conduct electricity and some do not. The main topics of this chapter include conductors, insulators, electric circuits, conducting liquids, conduction of electricity in water, electrolytes, electroplating, and applications of electroplating. Check the online revision notes for CBSE Class 8 Chapter 14 and revise all these concepts in less than 20 minutes.

Free Revision Notes for CBSE Class 8 Science Chapter 15 – Some Natural Phenomena

This chapter explains two natural phenomena - lightning and earthquakes and the measures that should be taken to minimise the destruction caused by these phenomena. The topics of this chapter are static charges, charged objects, how like and unlike charges interact, transfer of charges, electroscope, earthing, lightning, electric discharge, lightning conductors, earthquakes, the structure of the earth, seismic zones, seismic waves, and protection from earthquakes. Read about all these topics from our free revision notes for this chapter.

Free Revision Notes for CBSE Class 8 Science Chapter 16 – Light

In this chapter, you will learn topics like light, the laws of reflection, ray diagram, regular and diffused reflection, image formation in a plane mirror, real image and virtual image, dispersion of light, the human eye, and visual defects in the human eye. The revision notes for CBSE Class 8 Science Chapter 16 will help you understand all the topics given in this chapter thoroughly.

Free Revision Notes for CBSE Class 8 Science Chapter 17 – Stars and The Solar System

A lot of you might think that why are you studying about the solar system in Class 8. But, it is an important topic that helps you understand why the moon changes shapes every month, the significance of constellations and the solar system. The CBSE online revision notes for this chapter shed light on topics like comets, meteors, meteorites, artificial satellites, constellations, light year, pole start, the surface of the moon, phases of the moon and the dark side of the moon.

Free Revision Notes for CBSE Class 8 Science Chapter 18 – Pollution of Air and Water

This chapter covers some topics of everyday importance like air pollution, causes of air pollution, effects of pollution of air on the Taj Mahal, global warming, greenhouse effect, effects of global warming, how to reduce air pollution. This chapter also includes topics like water pollution, causes of water pollution, and potable water. The revision notes of this chapter provide you with complete guidance on all the topics of the chapter.

Why Choose askIITians for Online Revision Notes for CBSE Class 8 Science?

At askIITians, we have a team of the best Science teachers from all across India. Our experts have created chapter-wise revision notes for CBSE Class 8 Science. Not only this, we provide Class 6, 7, 8, 9, 10, 11, 12 notes for Science and Maths. These notes include pointwise explanations for all the topics along with diagrams and tables. With these notes, you can revise the concepts clearly and ensure that you remember all the important points of the chapters. Other important features of our online free revision notes for CBSE Class 8 Science include the following:

Our Class 8 CBSE notes contain all important definitions of the chapters.
They include answers to all NCERT questions along with diagrams and illustrations.
There are flowcharts and tables that will help you in retaining important information.
You can add any important point(s) in the notes that you think are important from the exam perspective.
Our notes are updated regularly based on the updates in the CBSE syllabus.

Revision Notes for CBSE Class 8 Science FAQs

Which website is the best for CBSE Class 8 Science Notes?

askIITians is no doubt the best website for CBSE Class 8 Science Revision Notes. Our Science experts have created easy-to-understand, pointwise, latest revision notes for all the chapters of Class 8 Science.

What are the chapters in Class 8 Science?

CBSE Class 8 Science includes 18 Chapters namely, 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 The Solar System, Chapter 18 – Pollution of Air and Water

Is the NCERT book enough for CBSE Class 8 Science?

CBSE recommends NCERT books for Class 8 Science. But, if you want to score full marks in Class 8 Science exams, you must not only rely on the NCERT textbook. You need detailed NCERT Solutions for Class 8 Science, along with Class 8 Science CBSE Notes, NCERT Exemplar solutions, practice papers and important questions. AskIITians provides all these additional resources to the students in our online CBSE coaching for Class 8.

Which book is best for Class 8 Science?

Along with the NCERT textbook for Class 8 Science, you can refer to Lakhmir Singh’s reference book and Together With Science books. Along with this, you must practice NCERT Exemplar problems to ensure that all the concepts are clear to you.