NCERT Solutions Class 8 Science: Chapter-Wise Details

NCERT Solutions Class 8 Science prepared by the top subject-matter experts at SimplyAcad contains answers of all questions given in the prescribed exercises of the NCERT textbook. The solutions will provide a deep understanding of the concepts, theories and formulas discussed in the chapter. Students can use the NCERT Solutions Class 8 Science to make their own notes for last minute quick revisions. 

 

NCERT Solutions Class 8 Science Chapter-Wise

Students can access the NCERT Solutions Class 8 Science by clicking the links given below in the table. 

 

CHAPTERS

Chapter 1 Crop Production and Management

Chapter 2 Microorganisms – Friend and Foe

Chapter 3 Synthetic Fibres and Plastics

Chapter 4 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

Overview of the Chapters of Class 8 Science

Chapter 1: Crop Production and Management

Crop Production and Management is the first chapter of the ncert class 8 science. The chapter focuses on the production of food through agricultural activities. Some other important sections that are discussed here are the categorisation of crops: rabi and kharif based on different seasons, followed by practices of crop production which includes- preparing the soil, sowing, adding manure and fertilisers, irrigation, protecting from weeds, harvesting, storage,etc. The chapter ends with different methods of irrigation. 

Sections in the chapter:

Section Name	Topic Name
1	Crop Production and Management
1.1	Agricultural Practices
1.2	Basic Practices of Crop Production
1.3	Preparation of Soil
1.4	Sowing
1.5	Adding Manure and Fertilisers
1.6	Irrigation
1.7	Protection from Weeds
1.8	Harvesting
1.9	Storage
1.10	Food from Animals

 

Chapter 2: Microorganisms – Friend and Foe

Microorganisms: Friend and Foe constitute as the second unit of the ncert class 8 science syllabus. The main hero of this chapter is microorganisms, students learn about them in length, followed by different uses of them that are important for our daily life such as making curd and bread, commercial use of microorganisms, use of microorganisms in medicines, vaccines and increasing soil fertility. After discussing the importance of microorganisms, the chapter moves forward with a few harmful effects that are caused by them such as diseases in humans, animals and plants, food poisoning, etc. Finally the chapter comes to an end with the nitrogen fixation and nitrogen cycle.

Sections in the chapter:

Section Name	Topic Name
2	Microorganisms Friend and Foe
2.1	Microorganisms
2.2	Where do Microorganisms Live?
2.3	Microorganisms and Us
2.4	Harmful Microorganisms
2.5	Food Preservation
2.6	Nitrogen Fixation
2.7	Nitrogen cycle

 

Chapter 3: Synthetic Fibres and Plastics

Synthetic Fibres and Plastics is the third chapter of the ncert class 8 science book, it focused on the different types of synthetic fibres such as rayon, polyester, nylon and acrylic. The characteristics of synthetic fibres are explained comprehensively. The second section of the chapter targets plastics, their properties and how the uses of plastics cause harm to the environment.

Sections in the chapter:

Section Name	Topic Name
3	Synthetic Fibres and Plastics
3.1	What are Synthetic Fibres?
3.2	Types of Synthetic Fibres Rayon
3.3	Characteristics of Synthetic Fibres
3.4	Plastics
3.5	Plastics as Materials of Choice
3.6	Plastics and the Environment

 

Chapter 4: Materials: Metals and Non-Metals

Materials: metal and nonmetals form the fourth chapter of ncert class 8 science book. The chapter discusses the physical as well as chemical properties of metals and non-metals.

Sections in the chapter:

Section Name	Topic Name
4	Materials Metals and Non-Metals
4.1	Physical Properties of Metals and Non-metals
4.2	Chemical Properties of Metals and Non-metals
4.3	Uses of Metals and Non-metals

 

Chapter 5: Coal and Petroleum

Coal and Petroleum is the fifth chapter of the ncert class 8 science book, it deals with natural resources and its classification. Coal and petroleum are fossil fuels formed in millions of years from dead remains of the living organisms. The chapter further talks about formations of different coal products such as coal tar and gas. Refining petroleum, natural gases are some of the other important concepts included in the chapter.

Sections in the chapter:

Section Name	Topic Name
5	Materials Coal and Petroleum
5.1	Coal
5.2	Petroleum
5.3	Natural Gas
5.4	Some Natural Resources are Limited

 

Chapter 6: Combustion and Flame

Combustion and Flame is the sixth chapter in the ncert class 8 science which focuses on the concept of combustion and its types. The chapter also includes some important safety measures to control fire. In the second half of the section, flame is explained in an elaborate manner with its detailed structure.

Sections in the chapter:

Section Name	Topic Name
6	Materials combustion and flame
6.1	What is Combustion?
6.2	How Do We Control Fire?
6.3	Types of Combustion
6.4	Flame
6.5	Structure of a Flame
6.6	What is a Fuel?
6.7	Fuel Efficiency

 

Chapter 7: Conservation of Plants and Animals

Conservation of Plants and Animals is the seventh chapter of the ncert class 8 science book. The chapter deals with the concept of deforestation and its cause, followed by the consequences of deforestation, and what measures should be taken to conserve forests and wildlife. It also talks about biosphere reserve, endemic species, flora and fauna, national park, wildlife sanctuary, migration, recycling of paper and reforestation.

Sections in the chapter:

Section Name	Topic Name
7	Conservation of Plants and Animals
7.1	Deforestation and Its Causes
7.2	Consequences of Deforestation
7.3	Conservation of Forest and Wildlife
7.4	Biosphere Reserve
7.5	Flora and Fauna
7.6	Endemic Species
7.7	Wildlife Sanctuary
7.8	National Park
7.9	Red Data Book
7.10	Migration
7.11	Recycling of Paper
7.12	Reforestation

 

Chapter 8: Cell: Structure and Functions

Cell: Structure and Functions is the eighth chapter in the list which talks about the structure, function, characteristics, types of cells, the different sizes, shapes, numbers are discussed at length with detailed diagrams. Some other important topics are cell Membrane, cytoplasm, nucleus, followed by a comparison between plant and animal cells. 

Sections in the chapter:

Section Name	Topic Name
8	Cell Structure and Functions
8.1	Discovery of the Cell
8.2	The Cell
8.3	Organisms show Variety in Cell Number, Shape and Size
8.4	Cell Structure and Function
8.5	Parts of the Cell Cell Membrane
8.6	Comparison of Plant and Animal Cells

 

Chapter 9: Reproduction in Animals

Reproduction in Animals is the ninth chapter of the ncert class 8 science book. The chapter comprises two different modes of reproduction in animals: sexual and asexual. The concepts of both the modes are detailed in length to help students learn them well. Some important topics such as fertilisation, development of embryo, reproductive organs, viviparous and oviparous animals are the main highlights of the chapter.

Sections in the chapter:

Section Name	Topic Name
9	Reproduction in Animals
9.1	Modes of Reproduction
9.2	Sexual Reproduction
9.3	Asexual Reproduction

 

Chapter 10: Reaching the Age of Adolescence

Reaching the Age of Adolescence is the tenth chapter in the ncert class 8 science book. Students will grasp the concepts related to hormones and its role in developing changes in the human body. Some important points covered in this chapter are adolescence, puberty, hormonal imbalances, transformation of a child into an adult, hormones responsible for reproductive functions and health. 

 

Section Name	Topic Name
10	Reaching The Age of Adolescence
10.1	Adolescence and Puberty
10.2	Changes at Puberty
10.3	Secondary Sexual Characters
10.4	Role of Hormones in Initiating Reproductive Function
10.5	Reproductive Phase of Life in Humans
10.6	How is the Sex of the Baby Determined?
10.7	Hormones other than Sex Hormones
10.8	Role of Hormones in Completing the Life History of Insects and Frogs
10.9	Reproductive Health

 

Chapter 11: Force and Pressure

Force and Pressure is an extremely important chapter in the ncert class 8 science syllabus. The chapter is an integral section of Physics and students must learn the concepts carefully to build the basics strong. The concept of force in relation to movements made between two different objects is described comprehensively with detailed illustrations. Similarly, concepts of pull, push, pressure, motion, pressure are discussed in length.

Sections in the chapter:

Section Name	Topic Name
11	Force and Pressure
11.1	Force – A Push or a Pull
11.2	Forces are due to an Interaction
11.3	Exploring Forces
11.4	A Force can Change the State of Motion
11.5	Force can Change the Shape of an Object
11.6	Contact Forces Muscular Force
11.7	Non-contact Forces Magnetic Force
11.8	Pressure
11.9	Pressure Exerted by Liquids and Gases
11.10	Atmospheric Pressure

 

Chapter 12: Friction

Friction is the twelfth chapter in the list, and mainly focuses on the concept of friction, factors concerning friction, increase and decrease of friction and fluid friction.

Sections in the chapter:

Section Name	Topic Name
12	Friction
12.1	Force of Friction
12.2	Factors affecting Friction
12.3	Friction : A Necessary Evil
12.4	Increasing and Reducing Friction
12.5	Wheels Reduce Friction
12.6	Fluid Friction

 

Chapter 13: Sound

Sound is an integral part of the ncert class 8 science book, and deals with the role of sound in our lives, such as in communication, etc.  Students will also be able to learn how the sound travels, how it is produced, and how we can listen to voices, music or any kind of sound. 

Sections in the chapter:

Section Name	Topic Name
13	Sound
13.1	Sound is Produced by a Vibrating Body
13.2	Sound Produced by Humans
13.3	Sound Needs a Medium for Propagation
13.4	We Hear Sound through Our Ears
13.5	Amplitude, Time Period and Frequency of a Vibration
13.6	Audible and Inaudible Sounds
13.7	Noise and Music
13.8	Noise Pollution