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3 
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Living things need this to eat. 
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4 
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Living things need this to drink. 
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7 
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The area that a living thing lives in. 
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8 
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Living things need this to live in. 
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9 
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This group of animals have scales. 
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10 
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This group of animals have gills. 
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11 
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Non-living things can't do this. 
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12 
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Living things need this to keep warm. 
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15 
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Living things do this as they get older. 
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16 
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Animals use these to react to things. 
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18 
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This is a non-living thing. 
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