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svetlana [45]
3 years ago
15

Why do they pressurize the cabin of airplane at 7,000 ft

Geography
1 answer:
n200080 [17]3 years ago
5 0
Hey there! 

Airplanes must be pressurized when flying at high altitudes so that the oxygen levels stay normal for us to breathe. The higher you go up, the thinner the air gets, which causes breathing problems for us humans. 

Thank you! 
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B. Canada and Mexico

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https://www.census.gov/foreign-trade/statistics/highlights/top/top1012cm.html

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Instantly evaporates, creating a huge shockwave on the ground that melts and recrystallizes rock. All that's left is a large circular hole in the ground and some very crumbling rocks. Volcanic activity often creates craters. Some volcanic craters are deep and have steep sides while others are wide and flat.

Know more about craters here

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