7. Aside from fuel or material, _____ and heat must be present for the combustion to occur.
8. Rusting occurs when _____, oxygen, and water react with one another.
9. When the oxygen supply is cut, the flame will be _____.
10. when overpopulation in an area occurs, dearcase or lack of _____ for breathing may happen.
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Answer:
7.fuel
8.iron
9.burnt out
10.oxygen
Explanation:
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