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Natural Sciences and Technology Grade 6-A - Thunderbolt Kids

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7. Why do we say the oxygen <strong>and</strong> carbon dioxide are in acycle?<br />

KEY CONCEPTS<br />

• Plants produce their own food (glucose) by a process called<br />

photosynthesis.<br />

• Photosynthesis takes place mainly in the leaves.<br />

• During photosynthesis the plant uses chlorophyll, sunlight<br />

energy, carbon dioxide (from the atmosphere) <strong>and</strong> water to<br />

make glucose.<br />

• Plants change some of the glucose (sugar) into starch<br />

which they store in their leaves, stems <strong>and</strong> roots, flowers,<br />

fruits <strong>and</strong> seeds.<br />

• Animals take in oxygen from the air <strong>and</strong> produce carbon<br />

dioxide when they breathe.<br />

• Plants recycle carbon dioxide <strong>and</strong> make oxygen during the<br />

process of photosynthesis.<br />

18 Life <strong>and</strong> Living

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