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Science Crossword Puzzle: Week #5

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Across
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A product that comes from trees and is used to build things and make paper
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The process by which plants create the energy that they need to grow
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A chemical inside the cells of a plant that helps in photosynthesis and gives most plants their green color
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The name that Carl Linnaeus gave to the world of plants
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Long, broad parts of plants that gather light for photosynthesis
Down
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The last name of a Swedish scientist who created categories for all living things
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A gas produced as a left-over product of animals breathing
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A gas produced as a left-over product of plants processing energy