By Plants
Yes (higher= less oxygen, and vice-versa for lower.) actually the oxygen ratio remains the same but air gets less dense at altitude so you have to breathe a lot more air to get the oxygen you need
The levels of carbon dioxide in the atmosphere stayed constant for thousands of years because of the carbon cycle, which moves carbon throughout the air, oceans and land. There was also no burning of fossil fuels (coal, oil and natural gas), and nobody had cut down the great forests of the world.
Carbon dioxide. That's not quite right because carbon dioxide is about 95% of the atmosphere of Mars.
Volcanic eruptions pump out dust, ash and other aerosols. These stay in the atmosphere for about a week, usually causing a cooling effect, as they reflect the sun's rays. The amount of carbon dioxide emitted is small compared with what comes from burning fossil fuels.
Mostly for the same reason you stay close to the surface of the planet - gravity!
to give plants nuetrition
Carbon in the atmosphere is added by processes like combustion, decomposition and losses from methane sources. It is removed by photosynthesis and, chemical reaction and dissolving in ocean water. As long as the sources exceed the sinks the carbon will stay (and increase) in the atmosphere. Human activities increase the sources and decrease the sinks.
If it stays the same, then the world's temperature does not go up. The carbon cycle moves carbon in and out of the atmosphere, the oceans and every other part of the biosphere. This is a natural effect and it keeps the world pleasantly warm for most of us to survive. The amount of carbon in the air stays the same. However, we have been burning coal and other fossil fuels for the past 250 years. Fossil fuels contain carbon that was laid down million of years ago, so this is extra gas into the atmosphere. This extra gas is also not removed. So it stays there warming up, causing global warming.
Yes (higher= less oxygen, and vice-versa for lower.) actually the oxygen ratio remains the same but air gets less dense at altitude so you have to breathe a lot more air to get the oxygen you need
It is because plants take in carbon dioxide and breathe out Oxygen whereas, man and animals breathe in oxygen and breathe out carbon dioxide. This cycle of life maintaines a roughly same percentage of O2 and CO2 in the atmosphere.
Yes. Trees are so important because they turn Carbon Dioxide from the atmosphere into Oxygen which we need to stay alive. So, the more trees that are cut down, the more Carbon Dioxide will stay in the atmosphere.
The levels of carbon dioxide in the atmosphere stayed constant for thousands of years because of the carbon cycle, which moves carbon throughout the air, oceans and land. There was also no burning of fossil fuels (coal, oil and natural gas), and nobody had cut down the great forests of the world.
Probably the question is about "Mars". Mars's atmosphere has a large amount of carbon dioxide in it and the atmosphere is very thin. Also, Mars is a lot colder than Earth and it has no liquid water. But you could stay there if you had the right things to help you too survive.
Carbon dioxide. That's not quite right because carbon dioxide is about 95% of the atmosphere of Mars.
Weather does not stay the same because of weather patterns around the world.Hope it helped! XD
Although many very smart astronomers have gone back and forth about this question, it is now generally believed that the rate of expansion of the universe in increasing, that is, it's expanding faster over time.
The actual atmosphere itself does not change with elevation, but the atmospheric pressure does.