3-3 Natural Environments.

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Presentation transcript:

3-3 Natural Environments

Environment Environment - surroundings

Limits on life Limits on life: Temperature Rainfall Soil Plants and animals adapt to survive

ecosystem Group of plants and animals that depend on each other to survive Pond Park Rain forest

Changes in ecosystems Small changes can have a big affect Clear cutting – soil erosion – loss of food and shelter

habitat Place where plants and animals live Rainforest – most diverse habitat

Extinction When species die out Dodo birds Mauritius Island Habitat destruction

Soil Humus – decayed plant or animal matter Fertile soils support lots of life

Loss of fertility: Soil erosion Planting the same crops Desertification – spread of desert like conditions