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| a group of plants and animals that depend on each other to live |
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| to discover how things are different and how they are alike |
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| tiny microscopic water animals |
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| making an animal blend in with its surroundings |
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| What is dissolved in the water that fish need to breathe? |
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| What is a baby salamander called? |
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| to spend the winter in sleep |
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| their bodies become the same temperature as their surroundings |
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| animals without backbones |
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| the very top or surface of the water |
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| part of an animal's body used to take oxygen from water |
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| a community of life that lives around and depends on trees |
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| begins when an animal eats a green plant, a larger animal eats the first animal, and a third animal may eat the second animal |
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| grow from spores that float through the air |
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| largest plants in the forest and in the world |
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| each circle is a year's growth of new wood |
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dark rings
harder and stronger than the other wood |
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lighter rings
carries the sap from the roots to the leaves |
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| make food for the rest of the tree |
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take in water and minerals from the soil
holds the tree in the ground |
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| a mineral from the soil used in the manufacturing of food in green plants |
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