Class 10 / Science
Class 10 Science Our Environment Notes
Notes on ecosystems, food chains, food webs, trophic levels, biodegradable waste, non-biodegradable waste, and ozone depletion.
advancedRevision notes
Key points
- An ecosystem includes living organisms and their physical environment.
- A food chain shows transfer of energy from one organism to another.
- Only a small part of energy transfers from one trophic level to the next.
- Non-biodegradable substances persist in the environment and can cause biomagnification.
Food chains and trophic levels
Producers capture solar energy and form the first trophic level.
Consumers depend directly or indirectly on producers for food.
Waste and ozone
Biodegradable waste is broken down by decomposers, while non-biodegradable waste remains for long periods.
Ozone layer protects Earth from harmful ultraviolet radiation.
Quick practice
- Define ecosystem.
- What is a food chain?
- What is biomagnification?
- Why is ozone layer important?
Related practice
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