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Definition
liquids that have pH values lower than 7
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Term
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Definition
| rain that has a pH between 1 and 5.5 |
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Term
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Definition
| liquids that have pH values greater than 7 |
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Term
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Definition
| something that can be broken down by microbes into harmless chemicals and used by other living things |
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Term
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Definition
| a species of living thing that is in danger of becoming extinct |
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Term
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Definition
| the wearing away of soil by wind and water |
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Term
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Definition
| the remains of organisms that lived millions of years ago |
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Term
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Definition
| the trapping of heat near Earth's surface by a layer of carbon dioxide |
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Term
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Definition
| any part of the environment used by humans |
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Term
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Definition
| a molecule made of three oxygen atoms that forms a layer high above Earth's surface |
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Term
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Definition
| chemicals used to kill unwanted pests |
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Term
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Definition
| anything that makes the surroundings unhealthy or unclean |
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Term
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Definition
| a gas found in the ground that gives off radiation |
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Term
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Definition
| the re-using of resources |
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Term
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Definition
| material that settles on the bottom of a body of water |
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Term
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Definition
| a combination of smoke and fog |
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Term
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Definition
| a species of living thing that is close to being endangered |
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