Question

Fill In the blanks.
1.) The atmosphere is held close to the earth's surface due to its _________.
2.) During Combustion, __________ is releases while oxygen is used up.
3.) Oxygen enters the air through ___________.​

Answer 1

Answer:

1.gravity

2.carbon dioxide

3.wind pipe

Answer 2

Answer:

1.gravity

2.carbon dioxide (CO2)

3.wind pipe

Explanation:

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