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Other scientists performed experiments that showed that the gas in Priestley's experiments was oxygen. From Priestley's results we can say that burning uses oxygen, animals need oxygen and plants give out oxygen. What do we know about photosynthesis so far?· Plants grow without eating. · Plants need water. · Plants give out oxygen. · Animals need the oxygen that plants produce. |
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Lesson 7 - Photosynthesis |
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© State of New South Wales, Department of Education and Training 2004