Class VIII Science

Crop Production And Management

• 1.a Agricultural Practices
• 1.b Basic Practices Of Crop Production
• 1.c Preparation Of Soil
• 1.d Sowing
• 1.e Adding Manure And Fertilisers
• 1.f Irrigation
• 1.g Protection From Weeds
• 1.h Harvesting
• 1.i Storage
• 1.j Food From

Micro-Organisms:: Friend And Foe

• 2.a Micro-Organisms
• 2.b Where Do Microorganisms Live?
• 2.c Microorganisms And Us
• 2.d Harmful Microorganisms
• 2.e Food Preservation
• 2.f Nitrogen Fixation
• 2.g Nitrogen Cycle

Synthetic Fibres And Plastics

• 3.a What Are Synthetic Fibres?
• 3.b Types Of Synthetic Fibres
• 3.c Characteristics Of Synthetic Fibres
• 3.d Plastics
• 3.e Plastics As Materials Of Choice
• 3.f Plastics And The Environment

Materials:: Metals And Non-Metals

• 4.a Physical Properties Of Metals And Non-Metals
• 4.b Chemical Properties Of Metals And Non-Metals
• 4.c Uses Of Metals And Nonmetals

Coal And Petroleum

• 5.a Coal
• 5.b Petroleum
• 5.c Natural Gas
• 5.d Some Natural Resources Are Limited

Combustion And Flame

• 6.a What Is Combustion?
• 6.b How Do We Control Fire?
• 6.c Types Of Combustion
• 6.d Flame
• 6.e Structure Of A Flame
• 6.f What Is A Fuel?
• 6.g Fuel Efficiency

Deforestation And Its Causes

• 7.a Deforestation And Its Causes
• 7.b Consequences Of Deforestation
• 7.c Conservation Of Forest And Wildlife
• 7.d Biosphere Reserve
• 7.e Flora And Fauna
• 7.f Endemic Species
• 7.g Wildlife Sanctuary
• 7.h National Park
• 7.i Red Data Book
• 7.j Migration
• 7.k Recycling Of Paper
• 7.l Reforestation

Cell Structure And Functions

• 8.a Discovery Of The Cell
• 8.b The Cell
• 8.c Organisms Show Variety In Cell Number, Shape, And Size
• 8.d Cell Structure And Function
• 8.e Parts Of The Cell
• 8.f Comparison Of Plant And Animal Cells

Reproduction In Animals

• 9.a Modes Of Reproduction
• 9.b Sexual Reproduction

Reaching The Age Of Adolescence

• 10.a Adolescence And Puberty
• 10.b Changes At Puberty
• 10.c Secondary Sexual Characters
• 10.d Role Of Hormones In Initiating Reproductive Function
• 10.e Reproductive Phase Of Life In Humans
• 10.f How Is The Sex Of The Baby Determined?
• 10.g Hormones Other Than Sex Hormones
• 10.h Role Of Hormones In Completing The Life History Of Insects And Frogs
• 10.i Reproductive Health

Force And Pressure

• 11.a Force A Push Or A Pull
• 11.b Forces Are Due To An Interaction
• 11.c Exploring Forces
• 11.d A Force Can Change The State Of Motion
• 11.e Force Can Change The Shape Of An Object
• 11.f Contact Forces
• 11.g Non-Contact Forces
• 11.h Pressure
• 11.i Pressure Exerted By Liquids And Gases
• 11.j Atmospheric Pressure

Friction

• 12.a Force Of Friction
• 12.b Factors Affecting Friction
• 12.c Friction: A Necessary Evil
• 12.d Increasing And Reducing Friction
• 12.e Wheels Reduce Friction
• 12.f Fluid Friction

Sound

• 13.a Sound Is Produced By A Vibrating Body
• 13.b Sound Produced By Humans
• 13.c Sound Needs A Medium For Propagation
• 13.d We Hear Sound Through Our Ears
• 13.e Amplitude, Time Period, And Frequency Of A Vibration
• 13.f Audible And Inaudible Sounds
• 13.g Noise And Music
• 13.h Noise Pollution

Chemical Effects Of Electric Current

• 14.a Do Liquids Conduct Electricity?
• 14.b Chemical Effects Of Electric Current
• 14.c Electroplating

Some Natural Phenomena

• 15.a Lightning
• 15.b Charging By Rubbing
• 15.c Types Of Charges And Their Interaction
• 15.d Transfer Of Charge
• 15.e The Story Of Lightning
• 15.f Lightning Safety
• 15.g Earthquakes
• 15.h Protection Against Earthquakes

Light

• 16.a What Makes Things Visible
• 16.b Laws Of Reflection
• 16.c Regular And Diffused Reflection
• 16.d Reflected Light Can Be Reflected Again
• 16.e Multiple Images
• 16.f Sunlight White Or Coloured
• 16.g What Is Inside Our Eyes?
• 16.h Care Of Eyes
• 16.i Visually Challenged Persons Can Read And Write
• 16.j What Is A Braille System?

Stars And The Solar System

• 17.a The Moon
• 17.b The Stars
• 17.c Constellations
• 17.d The Solar System
• 17.e Some Other Members Of The Solar System

Pollution Of Air And Water

• 18.a Air Pollution
• 18.b How Does Air Get Polluted?
• 18.c Case Study: The Taj Mahal
• 18.d Greenhouse Effect
• 18.e Water Pollution
• 18.f How Does Water Get Polluted?
• 18.g What Is Potable Water And How Is Water Purified?
• 18.h What Can Be Done?

Electrical Conductivity Of Liquids

• 19.a Electrical Conductivity Of Liquids
• 19.b When Do Liquids Conduct Electricity?
• 19.c Chemical Effect Of Electric Current
• 19.d Electrolytic Cell
• 19.e Electroplating

What Is Science

• 20.a What Is Science ?
• 20.b Why Do Science?
• 20.c Science And Change
• 20.d How Scientists Work – Scientific Method

Biodiversity And Its Conservation

• 21.a What Is Biodiversity?
• 21.b Biodiversity: A Case Study
• 21.c Value Of Biodiversity And Its Conservation
• 21.d What Is A National Park And A Sanctuary?

Different  Ecosystems

• 22.a What Is Ecosystem?
• 22.b Changes In The Ecosystem
• 22.c Types Fo Ecosystem
• 22.d Mangrove Ecosystem – Coringa
• 22.e Biotic Componets
• 22.f The Desert Ecosystem
• 22.g Forest Ecosystem
• 22.h Energy Flow In An Ecosystem

Production And Management Of Food From Animals

• 23.a Animal Husbandry
• 23.b Milk Production
• 23.c Selection Procedure
• 23.d Poultry
• 23.e Api Culture
• 23.f Inland Fisheries

Why Do We Fall Ill?

• 24.a Health And Its Failure
• 24.b Disease And Its Causes
• 24.c Causes Of Diseases
• 24.d Infections And Non-Infections Causes
• 24.e Means Of Spread
• 24.f Principles Of Treatment & Prevension