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The higher you go the thinner the air gets. If you go to high, you could die from lack of air.
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Jet fighters dont have pressurised cabins ( as commercial flights do)
25,000 feet is the crucial point, the lungs are incapable of absorbing oxygen at such low air pressure, a pressure demand mask overcomes this problem.
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∙ 12y ago
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∙ 14y agoThey use them because at high altitudes the air density gets smaller so they can not breathe.
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∙ 14y agobecause the air is thinner so it is harder to breathe
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∙ 10y agoOzone is present in the stratosphere of the earth's atmosphere. It protects us from the harmful UV light of the sun.
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∙ 13y agoYes, there is less everything at higher altitudes until you reach the vacuum of space.The atmosphere holds in less oxygen higher up.
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∙ 11y agoUmmm...humans need oxygen at any altitude :)
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∙ 14y agoyou need oxygen in flying in high altitudes because the amount of oxygen in the air gets thinner as the altitude rises..
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∙ 9y agoThe air is too thin at high altitude for a human to breath. Oxygen is needed to prevent a pilot (as an example) from blacking out and dying.
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∙ 14y agoYou don't.
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In general what is true about places at higher altitudes?
They have cooler temperatures than places at lower altitudes.
Why the density decrees at higher altitudes?
the density decreases because their is more air pressure in lower altitudes and as you go up their is less air pressure making it hard to breath
Why does it get harder to breathe in high elevation?
At high altitude, there is less oxygen, so breathing rate is increased to compensate.
How do people who live in high altitute places such as mountains get enough oxygen?
Actually, the percentage of oxygen in air does not decrease in high altitudes. What does decrease is the pressure of the air. So when breathing in at higher altitudes, the lower pressure causes less air to rush into the lungs as each breath is taken. At sea level, air contains about 21% oxygen. At 18,000 feet elevation, air still contains about 21% oxygen; there is just less air!People (and animals, for that matter) adapt over a period of many years to a high-altitude environment. Their bodies become more efficient at obtaining and using oxygen.
Cooler temperatures are found at higher?
altitudes
Is the oxygen less at high altitudes?
Yes. Air is less dense at higher altitudes, so the oxygen is at a lower concentration.
In general what is true about places at higher altitudes?
They have cooler temperatures than places at lower altitudes.
What is the adaptation for loading and unloading oxygen at high altitudes?
At higher altitudes, where there is less oxygen available, the body makes more red blood cells, hemoglobin, to carry oxygen more efficiently.
What has air composition to do with why breathing at high altitude is difficult?
It is not so much as the composition that is important, it is that at higher altitudes there is less air. Air is about 20% oxygen, but the higher up you go in altitude, the thinner air will have less oxygen. That's what makes breathing more difficult at higher altitudes.
Why does atheletes who practice at higher altitudes experience lightheaded feeling?
Because there is less oxygen in the air at high altitude.
How does pressure change with height?
When you get into higher altitudes, there are less molecules. Making the pressure less dense. It also has less oxygen molecule, making it harder to breathe.
Why are oxygen masks nessesary when flying at high altitudes?
Oxygen masks are needed at higher altitude because the air is less dense, therefore less air molecules are getting into your lungs when you breath.
At higher altitudes there is less oxygen in the air How might the composition of blood in people living in these higher altitudes differ from the blood in people living at sea level?
In an effort to take in as much Oxygen is available to us, the human body increases the number of RBCs in the system, which also would reflect in a higher Haemoglobin count for such people.
What happens to oxygen as the distance from the surface increases?
because there is less oxygen when you get closer to space the air is thinner, meaning oxygen will be harder to breathe at higher altitudes which can make you lack energy and become tired.
Why is it harder to breathe as you climb higher while hiking in the mountains?
As you climb higher the less oxygen you because higher altitudes and because atmospheric pressure is lower, the air molecules and hence the O2 is less concentrated per unit volume.
Why is it more difficult to breath on mountains than on plains?
At higher altitudes, the air pressure is lower. Therefore each breath you take contains less oxygen.
Why don't birds fly above altitudes of 50 miles or higher?
Oxygen
