NCERT Solutions for Class 8 Science

Chapter 1: Crop Production and Management

In this chapter the main key concepts you will be reading are Agricultural Practices, Basic Practices of Crop Production, Preparation of Soil, Sowing, Adding Manure and Fertilizers, Irrigation, Protection from Weeds, Harvesting, Storage, and Food from Animals.

Chapter 2: Microorganisms: Friend and Foe

In this chapter the main key concepts you will be reading are Microorganisms, where do Microorganisms Live? Microorganisms and Us, Harmful Microorganisms, Food Preservation, Nitrogen Fixation, Nitrogen cycle.

Chapter 3: Synthetic Fibres and Plastics

In this chapter the main key concepts you will be reading are what are Synthetic Fibres? Types of Synthetic Fibres, Characteristics of Synthetic Fibres, Plastics, Plastics as Materials of Choice, Plastics and the Environment.

Chapter 4: Materials: Metals and Non-Metals

In this chapter the main key concepts you will be reading are Physical Properties of Metals and Non-metals, Chemical Properties of Metals and Non-metals, Uses of Metals and Non-metals.

Chapter 5: Coal and Petroleum

In this chapter the main key concepts you will be reading are Coal, Petroleum, Natural Gas, Some Natural Resources are Limited.

Chapter 6: Combustion and Flame

In this chapter the main key concepts you will be reading are what is Combustion? How Do We Control Fire? Types of Combustion, Flame, Structure of a Flame, What is a Fuel? Fuel Efficiency.

Chapter 7: Conservation of Plants and Animals

In this chapter the main key concepts you will be reading are Deforestation and Its Causes, Consequences of Deforestation, Conservation of Forest and Wildlife, Biosphere Reserve, Flora and Fauna, Endemic Species, Wildlife Sanctuary, National Park, Red Data Book, Migration, Recycling of Paper, Reforestation.

Chapter 8: Cell - Structure and Functions

In this chapter the main key concepts you will be reading are Discovery of the Cell, The Cell, Organisms show Variety in Cell Number, Shape and Size, Cell Structure and Function, Parts of the Cell, Comparison of Plants and Animals Cells.

Chapter 9: Reproduction in Animals

In this chapter the main key concepts you will be reading are Modes of Reproduction, Sexual Reproduction, and Asexual Reproduction.

Chapter 10: Reaching the Age of Adolescence

In this chapter the main key concepts you will be reading are Adolescence and Puberty, Changes at Puberty, Secondary Sexual Characters, Role of Hormones in Initiating Reproductive Function, Reproductive Phase of Life in Humans, How is the Sex of the Baby Determined? Hormones other than Sex Hormones, Role of Hormones in Completing the Life History of Insects and Frogs, Reproductive Health.

Chapter 11: Force and Pressure

In this chapter the main key concepts you will be reading are Force: A push or a Pull, Forces are due to an Interaction, Exploring Forces, A Force can Change the State of Motion, Force can Change the Shape of an object, Contact Forces, Non-contact Forces, Pressure, Pressure Exerted by Liquids and Gases, Atmospheric Pressure.

Chapter 12: Friction

In this chapter the main key concepts you will be reading are Force of Friction, Factors affecting Friction, Friction: A Necessary Evil, Increasing and Reducing Friction, Wheels Reduce Friction, Fluid Friction.

Chapter 13: Sound

In this chapter the main key concepts you will be reading are Sound is produced by Vibrating Bodies, Sound Produced by Humans, Sounds Needs a Medium for Propagation, We Hear Sound through Our Ears, Aptitude, Time Period and Frequency of a vibration, Audible and Inaudible Sounds, Noise and Music, Noise Pollution.

Chapter 14: Chemical Effects of Electric Current

In this chapter the main key concepts you will be reading are Do Liquids Conduct Electricity? Chemical Effects of Electric Current, Electroplating.

Chapter 15: Some Natural Phenomena

In this chapter the main key concepts you will be reading are Lightning, Charging by Rubbing, Types of Charges and Their Interaction, Transfer of Charge, the Story of Lightning, Lightning Safety, Earthquakes.

Chapter 16: Light

In this chapter the main key concepts you will be reading are What makes Things Visible, Laws of Reflection, Regular and Diffused Reflection, Reflected Light Can be Reflected Again, Multiple Images, Sunlight – White or Coloured, What is inside Our Eyes? Care of the Eyes, Visually Impaired Persons Can Read and Write, What is Braille System?

Chapter 17: Stars and the Solar System

In this chapter the main key concepts you will be reading are The Moon, the Stars, Constellations, the Solar System, Some Other Members of the Solar System.

Chapter 18: Pollution of Air and Water

In this chapter the main key concepts you will be reading are Air Pollution, How does Air Get Polluted? Case Study - the Taj Mahal, Greenhouse Effect, What can be done? Water Pollution, How does Water Get Polluted? What is Potable Water and how is Water Purified? What can be done?