1) What do plants need to make food? a) Nitrogen b) sunlight c) oxygen 2) The process by which plants make their own food is called a) Photosynthesis b) respiration c) Growth 3) What gas do plants take in during photosynthesis? a) oxygen b) Nitrogen c) Carbon dioxide 4) Which part of plant absorbs sunlight? a) Leaves b) root c) stem 5) What gas do plants release during photosynthesis? a) Carbon dioxide b) oxygen c) Hydrogen

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