Topic: 1. Energy is a physical quantity that follows precise natural laws.
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Topic: 2. Physical processes on Earth are the result of energy flow through the Earth system.
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Topic: 3. Biological processes depend on energy flow through the Earth system.
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Topic: 4. Various sources of energy are used to power human activities.
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Topic: 5. Energy decisions are influenced by economic, political, environmental, and social factors.
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Topic: 6. The amount of energy used by human society depends on many factors.
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Topic: 7. The quality of life of individuals and societies is affected by energy choices.
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Topic: 8. Wood based bio-fuels are one form of energy that is renewable
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