CBSE Class 8 Science Revision Notes

Introduction to CBSE Exam

The CBSE is an autonomous board of education in India. This national body is managed and controlled by the Government of India. Its effective educational policies, co-curricular activities, and extensive syllabus have set a very high educational standard in all schools. As a result, the number of schools getting their affiliation from CBSE is increasing. The CBSE syllabus focuses on theoretical and practical knowledge, enabling students to learn through experience. 

CBSE Class 8 Science Notes

Science is a subject that is often known to arouse interest in knowing more about things around us. From life on earth to chemical equations and types of forces, all these are explained in Science in their respective branches. In addition, it is a field that helps students study various scientific concepts and topics. 

To make studying the Science subject easy, students must refer to the CBSE Class 8 Science Notes. The colourful illustrations, solved examples, labelled diagrams, charts, and tables in the class 8th science notes make learning interesting and engaging. In general, well-designed CBSE Class 8 Science Notes are crucial for academic success. It can result in improved preparation levels and higher test scores. 

Chapter-Wise CBSE 8 Class Science Notes

The Extramarks CBSE Class 8 Science Notes is as per the NCERT books. In addition, it includes the following chapters.

Chapter 1 – Crop Production and Management

The first chapter in the CBSE Class 8 Science Notes covers food production through different agricultural practices. It also explains the classification of crops in India into two types, namely Kharif and Rabi, depending on the season. It also elaborates on different cultivation practices. 

Chapter 2 – Microorganisms – Friend and Foe 

This chapter starts with a simple definition of microorganisms and then describes their concepts. It then explains the important roles that microorganisms play in our lives and the numerous diseases caused by them.

Chapter 3 – Synthetic Fibres and Plastics

In the CBSE class 8 science notes, Synthetic fibres and their types are discussed. In addition, the properties of synthetic fibres are elaborated along with the introduction of plastics, their properties, and their impact on the environment.

Chapter 4 – Materials – Metals and Non-Metals

The chapter in the CBSE syllabus describes the physical properties, chemical properties, and uses of metals and nonmetals. In addition, several activities are included in the CBSE class 8 science notes to describe all these characteristics in a simple way. 

Chapter 5 – Coal and Petroleum 

This chapter is based on natural resources and their categorization. It talks about fossil fuels and explains the production of coke, coal gas, and coal tar. 

Chapter 6 – Combustion and Flame 

This chapter in the CBSE class 8 science notes is curated with the help of activities. The chapter covers firefighting measures, fuel, efficiency, and the harmful effects of burning fuel. The concept of the flame and its structure is also included in this chapter.

Chapter 7 – Conservation of Plants and Animals

This chapter covers topics like deforestation and its causes, consequences of deforestation, ways to protect wildlife and forests, etc. It also talks about flora and fauna, wildlife sanctuary, migration, endemic species, reforestation, etc. 

Chapter 8 – Cell – Structure and Functions

The chapter explains cells and how they differ from one organism to another. It also talks about cell structure and function.

Chapter 9 – Reproduction in Animals 

In this chapter, the two types of reproduction are explained. The chapter in the CBSE class 8 science notes focuses more on the subject of sexual reproduction. Topics like the male and female reproductive organs, fertilisation, viviparous and oviparous animals, and embryo development are explained. 

Chapter 10 – Reaching the Age of Adolescence 

This chapter explains the role of hormones in the human body. It also explains issues such as adolescence, puberty, and the changes that occur during puberty. 

Chapter 11 – Force and Pressure 

Students find this chapter most difficult. The topics of Force are explained in detail. Contact forces, non-contact forces, pressure, pressurisation by gases and liquids, and atmospheric pressure are also discussed in this chapter. 

Chapter 12 – Friction 

This chapter includes topics such as the Force of friction, the properties of friction, and fluid friction. 

Chapter 13 – Sound 

The chapter explains how sounds are made, how they spread, how we hear them, and the loudness of sounds. In CBSE class 8 Science notes, all detailed solutions are included. 

Chapter 14 – Chemical Effects of Electric Current 

Important questions based on topics like Chemical Effects of Electric Current and Electroplating are included. This chapter also explains the good and bad conductors of electricity. 

Chapter 15 – Some Natural Phenomena 

The chapter covers different natural disasters and highlights some steps to reduce the destruction caused due to such natural phenomena. The CBSE class 8 Science notes provide all solutions of textual and extra questions of this chapter.

Chapter 16 – Light 

This chapter is about light and how we can see things around us. The chapter includes the law of reflection, dispersion of white light, and the human eye. The chapter also covers steps to protect your eyes and visually impaired people. 

Chapter 17 – Stars and The Solar System 

This chapter explains celestial objects such as the moon, stars, and constellations. Solar system and properties of all planets, comets, asteroids, etc.

Chapter 18 – Pollution of Air and Water

In the CBSE Class 8 Science notes, this chapter explains the negative effects on the environment caused by air and water pollution. It also includes greenhouse effects, air and water pollutants.

Students may click on the topics to access the CBSE Class 8 Science notes for the respective chapters. 

Benefits of CBSE Class 8 Science Notes

Some of the benefits of Extramarks CBSE Class 8 Science notes include

• Error-free solutions: The 8th standard science notes include solutions and important key points based on all concepts in the NCERT books. By referring to these notes, students can get a clear idea of these topics and even clarify all the doubts that they find challenging. 
• Time-saving: The notes will also save time. The notes include all topics in the chapters in the CBSE curriculum. As a result, students will not have to waste time searching for study materials. These notes also ensure a hassle-free revision. 
• Experienced faculty: The CBSE class 8 Science notes are curated by the team of academic professionals and subject experts at Extramarks. They are prepared lucidly so that every student will find it easy to comprehend. As a result, these notes are the best resource for a clear understanding of the subject. 

CBSE Class 8 Science Notes

Professionally prepared by experienced Extramarks experts and teachers, these CBSE Class 8 Science notes can help students understand complex concepts based on all chapters. Our 8th standard science notes are designed to make even the most difficult subject seem easy for students to learn. It helps students acquire a rational approach and learn shortcuts, techniques, and formulas about Science. Based on the latest syllabus and guidelines by the CBSE board, students can use these class 8th science notes and easily prepare well for their exams.

CBSE Class 8 Science Notes are available online and can be easily accessed by students. Extramarks study materials like CBSE sample papers, CBSE revision notes, and CBSE previous year question papers will help students get a clear and precise understanding of each chapter included in the CBSE syllabus. Students will get a detailed and well-explained description of each chapter. The solutions to all extra questions are also expressed in easy language in the CBSE Class 8 Science Notes.