Science VIII

Biology
Crop Production and Management
5 Topics
Introduction to Crop Production and Management
Types of Crops
Agricultural Implements
Agricultural Practices
Sowing and Increasing Fertility of Soil
Microorganisms: Friend and Foe
 5 Topics
Microorganisms
Microorganisms- Friend and Foe
Microbes in the Food Industry Medicine
Harmful Microorganisms
Nitrogen Cycle
Conservation of Plants and Animals
 9 Topics
Causes & Examples of Extinct Animals
Causes & Factors that Contribute to Deforestation
Effects of Deforestation on Biodiversity
Deforestation and Human Health
Types & Importance of Biodiversity
National Parks And Sanctuaries in India
Conservation of Forest and Wildlife
Recycling of Paper
Causes of Global Warming
Cell – Structure and Functions
 10 Topics
Introduction to Cell
The Cell Theory
Variety in Cell Number, Shape
Size of Cells
Cell Structure
Cell Membrane
Cytoplasm
Nucleus
Gene
Comparison of Plant and Animal Cells
Reproduction in Animals
 7 Topics
Introduction to Reproduction in Animals
Asexual Reproduction and its Types
Sexual Reproduction, Fertilization and its Types
Introduction about Male Reproductive System
Introduction about Female Reproductive System
Fertilization and Fate of Ovum
Sequence of Post Fertilization Events
Reaching the Age of Adolescence
 8 Topics
Adolescence and Puberty
Changes at Puberty
Role of Hormones in Initiating Reproductive Function
Secondary Sexual Characters
Reproductive Phase of Life in Humans
How is the Sex of Baby Determined
Hormones others than Sex Hormones
Reproductive Health
Chemistry
Synthetic Fibres and Plastics
7 Topics
Types of Fibers
Different Types of Fibers
Process of Fibre Crops
Synthetic Fibres
Characteristics & Classification of Synthetic Fibers
Rayon Fabric and Nylon
Synthetic Polymers
Materials: Metals and Non-Metals
 7 Topics
Introduction to Metals and Non-metals
Physical Properties of Metals
Exceptional Properties Possessed by Metals
Physical Properties of Non-Metals
Chemical Properties of Metals and Non-Metals
Reaction of Metals and Non-Metals
Corrosion of Metals
Coal and Petroleum
 9 Topics
Natural Resources
Energy
Types of Energy
Kinetic Energy, Radiant, Thermal Energy, Sound, Electrical and Mechanical
Types of Potential Energy
Fossil Fuels
Types, Formation and Uses of Fossil Fuels
Energy Conversion
Law of Conservation of Energy
Combustion and Flame
 1 Topic
Conditions Necessary for Combustion
Physics
Force and Pressure
 12 Topics
Force – A Push or a Pull
Forces are due to an Interaction
Exploring Forces
Effects of Force
Muscular Force
Friction
Magnetic Force
Electrostatic Force
Gravitational Force
Pressure
Pressure Exerted by Liquids and Gases
Atmospheric Pressure
Friction
 6 Topics
Force of Friction
Factors Affecting Friction
Increasing and Reducing Friction
Friction: A Necessary Evil
Wheels Reduce Friction
Fluid Friction
Sound
 8 Topics
Sound is Produced by a Vibrating Body
Sound Produced by Humans
Sound Needs a Medium for Propagation
We hear Sound through our Ears
Characteristics of Sound
Audible and Inaudible Sounds
Noise and Music
Noise Pollution
Chemical Effects of Electric Current
 4 Topics
Conductivity Test of Liquids using an LED Tester
Conductivity Test of Liquids using a Magnetic Tester
Electroplating
Chemical Effects of Electric Current
Some Natural Phenomena
 10 Topics
Lightning
Charging by Rubbing
Types of Charges and Their Interaction
Transfer of Charge
The Story of Lightning
Lightning Safety
Lightning Conductor
Structure of the Earth
Earthquake
Protection against Earthquakes
Light
 20 Topics
What Makes Things Visible
Laws of Reflection
Image Formation by a Plane Mirror
Regular and Diffused Reflection
Reflected Light can be Reflected Again
Number of Images Formed by Multiple Reflection
Kaleidoscope
Sunlight — White or Coloured
What is inside our Eyes?
Function of Pupil
Rods and Cones
Blind Spot
Persistence of Vision
Hypermetropia
Myopia
Astigmatism
Old Age Eye Defects
Care of the Eyes
Visually Challenged Persons Can Read And Write
The Braille System
Stars and The Solar System
24 Topics
The Night Sky
Phases of the Moon
The Moon’s Surface
The Stars
The Moving Stars
Constellations: Introduction
Ursa Major
Finding Pole Star
The Orion and the Cassiopeia
Finding Sirius
The Solar System
The Sun
The Planets
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
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Types of Fibers

Science VIII Synthetic Fibres and Plastics Types of Fibers

[diffirent types of fibre ,manmade fibre,natural fibre ]

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