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NCERT Solutions for Class 8 Science  for all the exercises from Chapters 1 to 15 are provided here.

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Chapter 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 Fertilizers

1.6: Irrigation

1.7: Protection from Weeds

1.8: Harvesting

1.9: Storage

1.10: Food from Animals

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Chapter 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

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Chapter 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

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Chapter 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

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Chapter 13

Sound

13.1: Sound is Produced by Vibrating Bodies

13.2: Sound Produced by Humans

13.3: Sounds Needs a Medium for Propagation

13.4: We Hear Sound through Our Ears

13.5: Aptitude, Time Period and Frequency of a vibration

13.6: Audible and Inaudible Sounds

13.7: Noise and Music

13.8: Noise Pollution

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Chapter 16

Light

16.1: What makes Things Visible

16.2: Laws of Reflection

16.3: Regular and Diffused Reflection

16.4: Reflected Light Can be Reflected Again

16.5: Multiple Images

16.6: Sunlight – White or Coloured

16.7: What is inside Our Eyes?

16.8: Care of the Eyes

16.9: Visually Impaired Persons Can Read and Write

16.10: What is Braille System?

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Chapter 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

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Chapter 5 

Coal and Petroleum

5.1: Coal

5.2: Petroleum

5.3: Natural Gas

5.4: Some Natural Resources are Limited

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Chapter 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

8.6: Comparison of Plants and Animals Cells

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Chapter 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

11.7: Non-contact Forces

11.8: Pressure

11.9: Pressure Exerted by Liquids and Gases

11.10: Atmospheric Pressure

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Chapter 14 

Chemical Effects of Electric Current

14.1: Do Liquids Conduct Electricity?

14.2: Chemical Effects Of Electric Current

14.3: Electroplating

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Chapter 17

 Stars and The Solar System

17.1: The Moon

17.2: The Stars

17.3: Constellations

17.4: The Solar System

17.5: Some Other Members of the Solar System

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Chapter 3

Synthetic Fibres and Plastics

3.1: What are Synthetic Fibres?

3.2: Types of Synthetic Fibres

3.3: Characteristics of Synthetic Fibres

3.4: Plastics

3.5: Plastics as Materials of Choice

3.6: Plastics and the Environment

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Chapter 6 

Combustion and Flame

6.1: What is Combustion?

6.2: How Do We Control Fire?

6.3Types of Combustion

6.4: Flame

6.5: Structure of a Flame

6.6: What is a Fuel?

6.7: Fuel Efficiency

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Chapter 9 

Reproduction in Animals

9.1: Modes of Reproduction

9.2: Sexual Reproduction

9.3: Asexual Reproduction

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Chapter 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

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Chapter 15

Some Natural Phenomena

15.1: Lightning

15.2: Charging by Rubbing

15.3: Types of Charges and Their Interaction

15.4: Transfer of Charge

15.5: The Story of Lightning

15.6: Lightning Safety

15.7: Earthquakes

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Chapter 18 

Pollution of Air and Water

18.1: Air Pollution

18.2: How does Air Get Polluted?

18.3: Case Study- The Taj Mahal

18.4: Greenhouse Effect

18.5: What can be done?

18.6: Water Pollution

18.7: How does Water Get Polluted?

18.8: What is Potable Water and How is Water Purified?

18.9: What Can be Done?