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3-5
|
ESS3.A: Natural resources
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Energy and fuels humans use are derived from natural sources and their use affects the environment. Some resources are renewable over time, others are not.
|
|
3-5
|
ESS3.C: Human impacts on Earth systems
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Societal activities have had major effects on the land, ocean, atmosphere, and even outer space. Societal activities can also help protect Earth's resources and environments.
|
|
3-5
|
PS1.B: Chemical reactions
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Chemical reactions that occur when substances are mixed can be identified by the emergence of substances with different properties; the total mass remains the same.
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6-8
|
ESS3.A: Natural resources
|
Humans depend on Earth's land, ocean, atmosphere, and biosphere for different resources, many of which are limited or not renewable. Resources are distributed unevenly around the planet as a result of past geologic processes.
|
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6-8
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ESS3.C: Human impacts on Earth systems
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Human activities have altered the biosphere, sometimes damaging it, although changes to environments can have different impacts for different living things. Activities and technologies can be engineered to reduce people's impacts on Earth.
|
|
6-8
|
PS1.B: Chemical reactions
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Reacting substances rearrange to form different molecules, but the number of atoms is conserved. Some reactions release energy and others absorb energy.
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