Term
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Definition
| A system that lets matter in and out, or lets energy in and out, or both. |
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Term
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Definition
| A system that lets matter in, but doesn't let any get out. Or it lets energy in, but doesn't let any get out. |
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Term
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Definition
| A system that doesn't let any matter in or out, or doesn't let any energy in or out. |
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Term
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Definition
| A system that's basically closed to matter, but open to energy. |
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Term
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Definition
| All the solid, rocky part of Earth. |
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Term
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Definition
| All the water in, on and above (in the air) Earth. |
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Term
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Definition
| The relatively thin layer of gases that surround Earth, held down in place by gravity. |
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Term
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Definition
| All the living things of Earth. |
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