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| amphibia: "2 lives", land and water based. |
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| control: A separate experiment, done exactly like the experimental group. The only difference is that no variable are changed so that it provides a comparison allowing you to see what changing a variable does compared to not changing it at all. |
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| crustacean: One of a class of arthropods having a hard shell, two pairs of antennae, and usually gills, including lobsters, crabs, shrimps, etc. |
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| habitat: The region where a species or individual naturally or usually lives or is found. |
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| metallurgy: The technology of extracting metals from ores and producing alloys of desired properties. |
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| morphology: The branch of biology that deals with the form and structure of plants and animals. |
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| oxidation: The union of a substance with oxygen. |
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