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Plants and animals that live in water are aquatic.
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Aquatic animals that have a hard outer shell and jointed
limbs; for example, a crayfish.
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The community of plants and animals that share a common
environment.
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The process where plants make food from light and nutrients.
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A waste material that contaminates the water, air or soil,
making it harmful for living things.
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To lay eggs (refers to animals that normally lay a large
number of eggs, such as fish and insects).
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The land area that sends rain and snowmelt to a river or
lake.
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