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6 Cards in this Set
- Front
- Back
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tundra
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migrate
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herds
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thaw
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spines
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hardy
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a plant or animal that is tough and can stand bad conditions
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the sharp, thorn-like points on a cactus
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a grassy plain that is frozen most of the year
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to become unfrozen
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large groups of animals that travel together
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to move south during the winter in order to find food
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