ECOSYSTEMS.

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Presentation transcript:

ECOSYSTEMS

Living things + Nonliving things ECOSYSTEM

Living things in an ecosystem are called a… COMMUNITY

Population + Population COMMUNITY

All energy in a food web comes from the… SUN

What makes ecosystems different? Amount of water 1 Amount of sunlight 2 3 Type of soil

Name the three members in every community. Producers Consumers Decomposers

What causes ecosystems to change? Natural causes: 1 Drought Disease 2 3 Fire 4 Overpopulation

What causes ecosystems to change? Changes caused by humans: 1 Water pollution 2 Air pollution 3 Land pollution 4 Construction

How can humans help to prevent changes in ecosystems? 1 Use resources wisely 2 Laws that control pollution 3 Clean up litter 4 Keep rivers and lakes clean