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2.4 Food Preservation and Food Poisoning

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2.04 Food Preservation and Food Poisoning

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CBSE 8 Science

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01 Crop Production and Management
  • 1.1 Agricultural Practices and Cropping Pattern
  • 1.2 Preparation of Soil
  • 1.3 Sowing
  • 1.4 Adding Manure and Fertilisers
  • 1.5 Irrigation
  • 1.6 Protection from Weeds and Harvesting
  • 1.7 Storage and Food From Animals
  • Chapter 1 Crop Production and Management - Test
02 Microorganisms Friend and Foe
  • 2.1 Microorganisms: Classification and Habitat
  • 2.2 Friendly Microorganisms
  • 2.3 Harmful Microorganisms
  • 2.4 Food Preservation and Food Poisoning
  • 2.5 Nitrogen Fixation and Nitrogen Cycle
  • Chapter 2 Microorganisms Friend and Foe - Test
03 Synthetic Fibres and Plastics
  • 3.1 Synthetic Fibres and their properties
  • 3.2 Types of Synthetic Fibres
  • 3.3 Plastics
  • 3.4 Useful Properties of Plastics
  • 3.5 Plastic and the Environment
  • Chapter 3 Synthetic Fibres and Plastics - Test
04 Materials: Metals and Non-Metals
  • 4.1 Physical Properties of Metals and Nonmetals
  • 4.2 Chemical Properties of Metals and nonmetals: Reaction with Oxygen and Water
  • 4.3 Chemical Properties of Metals and Nonmetals: Reaction with Acids and Bases, and Displacement Reaction
  • 4.4 Uses of Metals and Nonmetals
  • Chapter 4 Materials: Metals and Nonmetals - Test
05 Coal and Petroleum
  • 5.1 Natural and Manmade Resources
  • 5.2 Coal
  • 5.3 Petroleum
  • 5.4 Natural Gas
  • 5.5 Limitations of Natural Resources
  • Chapter 5 Coal and Petroleum - Test
06 Combustion And Flame
  • 6.1 Combustion: Concept and Conditions
  • 6.2 Types of Combustion Reaction, Ignition Temperature and Fire Control
  • 6.3 Flame
  • 6.4 Fuel
  • 6.5 Harmful Effects of Burning Fuels
  • Chapter 6 Combustion and Flame - Test
07 Conservation of Plants and Animals
  • 7.1 Deforestation
  • 7.2 Flora and Fauna
  • 7.3 Conservation of Forest and Wildlife: Wildlife Sanctuary and Biosphere Reserve
  • 7.4 Conservation of Forest and Wildlife: National Park
  • 7.5 Recycling of Paper and Reforestation
  • Chapter 7 Conservation of Plants and Animals - Test
08 Cell - Structure and Functions
  • 8.1 Introduction to cell
  • 8.2 Variety in Cell Number, Shape and Size
  • 8.3 Structure, Function and Parts of Cell: Basic Components
  • 8.4 Structure, Function and Parts of Cell: Other Components and Comparison of Plant and Animal cells
  • Chapter 8 Cell - Structure and Functions - Test
09 Reproduction in Animals
  • 9.1 Modes of Reproduction
  • 9.2 Sexual Reproduction: Reproductive System
  • 9.3 Sexual Reproduction: Fertilization
  • 9.4 Development of Embryo
  • 9.5 Asexual Reproduction
  • Chapter 9 Reproduction in Animals - Test
10 Reaching the Age of Adolescence
  • 10.1 Adolescence, Puberty and Reproductive Phase of Life
  • 10.2 Changes at Puberty
  • 10.3 Role of Hormones in Organisms
  • 10.4 Sex Determination
  • 10.5 Reproductive Health
  • Chapter 10 Reaching The Age Of Adolescence - Test
11 Force And Pressure
  • 11.1 Force - A Push or Pull
  • 11.2 Effects of Force on Objects
  • 11.3 Contact Forces
  • 11.4 Non-Contact forces
  • 11.5 Pressure
  • 11.6 Pressure exerted by Liquids
  • 11.7 Pressure exerted by Gases and Atmospheric Pressure
  • Chapter 11 Force and Pressure - Test
12 Friction
  • 12.1 Friction Force and its Dependency
  • 12.2 Friction: a Necessary Evil
  • 12.3 Increasing and Decreasing the Friction
  • 12.4 Fluid Friction
  • Chapter 12 Friction - Test
13 Sound
  • 13.1 Sound Production
  • 13.2 Propagation of Sound
  • 13.3 Ear
  • 13.4 Amplitude, Time Period And Frequency of Vibration
  • 13.5 Noise and Music
  • Chapter 13 Sound - Test
14 Chemical Effects of Electric Current
  • 14.1 Do Liquids Conduct Electricity?
  • 14.2 Chemical Effect of Electric Current
  • 14.3 Electroplating
  • 14.4 Uses of Electroplating
  • Chapter 14 Chemical Effects of Electric Current - Test
15 Some Natural Phenomena
  • 15.1 Electric Charge: Nature, Types and Transfer
  • 15.2 Lightning: What is lightning
  • 15.3 Lightning: Safety Measures
  • 15.4 Earthquakes
  • 15.5 Protection against Earthquakes
  • Chapter 15 Some Natural Phenomena - Test
16 Light
  • 16.1 Light: Laws of Reflection
  • 16.2 Image formation by Plane Mirror
  • 16.3 Multiple Images, Kaleidoscope and Dispersion
  • 16.4 Human Eye
  • 16.5 Care of Eyes
  • 16.6 Can a Visually Challenged Persons Read and Write?
  • Chapter 16 Light - Test
17 Stars and the Solar System
  • 17.1 The Night Sky and the Moon
  • 17.2 The Stars
  • 17.3 Constellations
  • 17.4 The Structure of Solar System
  • 17.5 Planets in the Solar System
  • 17.6 Other Members of Solar System
  • 17.7 Artificial Satellites
  • Chapter 17 Stars and The Solar System - Test
18 Pollution of Air and Water
  • 18.1 Air Pollution: The pollutants
  • 18.2 Acid Rain
  • 18.3 Global Warming and Greenhouse Effect
  • 18.4 The Oxygen cycle and The Ozone Layer
  • 18.5 Ways to Reduce Air Pollution
  • 18.6 Water Pollution
  • 18.7 Sources of Water Pollution
  • 18.8 Pollution of Ganga River: A Case Study
  • 18.9 Purification of water and ways to reduce water pollution
  • Chapter 18 Pollution of Air and Water - Test
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