Class 8 Science - Important Notes
Chapter 1: Crop Production and Management
- Crop production: Growing plants for food and fibre.
- Steps: Preparation of soil, sowing, manure, irrigation, weeding, harvesting, storage.
Chapter 2: Microorganisms: Friend and Foe
- Microorganisms: Bacteria, fungi, viruses.
- Uses: Making curd, medicines, cleaning environment.
Chapter 3: Synthetic Fibres and Plastics
- Synthetic fibres: Nylon, polyester, acrylic.
- Plastics: Thermoplastics and thermosetting plastics.
Chapter 4: Materials: Metals and Non-metals
- Metals: Conduct heat, malleable.
- Non-metals: Poor conductors, brittle.
Chapter 5: Coal and Petroleum
- Fossil fuels formed over millions of years.
- Used as fuel and in industries.
Chapter 6: Combustion and Flame
- Combustion: Burning of substances.
- Types: Complete and incomplete.
Chapter 7: Conservation of Plants and Animals
- Protecting nature and wildlife.
- National parks, sanctuaries.
Chapter 8: Cell – Structure and Functions
- Cell: Basic unit of life.
- Parts: Nucleus, cytoplasm, membrane.
Chapter 9: Reproduction in Animals
- Asexual and sexual reproduction.
Chapter 1: Crop Production and Management
- Crop production: Growing plants for food and fibre.
- Steps: Preparation of soil, sowing, manure, irrigation, weeding, harvesting, storage.
Chapter 2: Microorganisms: Friend and Foe
- Microorganisms: Bacteria, fungi, viruses.
- Uses: Making curd, medicines, cleaning environment.
Chapter 3: Synthetic Fibres and Plastics
- Synthetic fibres: Nylon, polyester, acrylic.
- Plastics: Thermoplastics and thermosetting plastics.
Chapter 4: Materials: Metals and Non-metals
- Metals: Conduct heat, malleable.
- Non-metals: Poor conductors, brittle.
Chapter 5: Coal and Petroleum
- Fossil fuels formed over millions of years.
- Used as fuel and in industries.
Chapter 6: Combustion and Flame
- Combustion: Burning of substances.
- Types: Complete and incomplete.
Chapter 7: Conservation of Plants and Animals
- Protecting nature and wildlife.
- National parks, sanctuaries.
Chapter 8: Cell – Structure and Functions
- Cell: Basic unit of life.
- Parts: Nucleus, cytoplasm, membrane.
Chapter 9: Reproduction in Animals
- Asexual and sexual reproduction.
