Questions


October 2021 1 32 Report
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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