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| keeping track of something for a specific purpose;certain chems are monitored in the environment to ensure they do not exceed safe levels |
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| animals without a backbone |
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| how poisonous a substance is |
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| metals that have a density of 5 or higher; heavy metals are one one type of substance monitored to determine water quality |
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| volitile organic compounds |
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| the atmospheric gases that trap heat |
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| chlorofluorocarbons, causes the ozone layer to thin |
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| scattering of a substance away from its source |
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| top of the groundwater zone |
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| tiny spaces between soil grains in a rock;a substance with many pores is porous;if these pores connected, a substance is permeable |
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| description of a substance that contains connected pores;fluids can flow through a permeable substance |
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| liquid that dissolves and carries substances as it passes through soil |
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| mixing of a substance with air or water this reduces the substance's concentration |
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| breakdown of materials by organisms such as earthworms, bacteria, and fungi;"bio-"refers to living things and "degrade"means to break up |
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| refers to processes or environments that require or contain oxygen |
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| refers to processes or environments that do not require or contain oxygen |
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| clean up the environment using plants |
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| breakdown of compounds by sunlight |
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| increase in concentration of a chem. or element as it moves up the food chain |
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| material safety data sheets |
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