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Oxygen!!!!
There is the oxygen/carbon dioxide cycle.
Animals(humans included) exhale (breath out) carbon dioxide.
Carbon dioxide is a heavy gas and sinks to the ground.
On the ground it is absorbed by green plant leaf.
In the green plant leaf, under the process of photosynthesis, in UV (Sun)light. the CO2 is broken down into oxygen and carbon.
The oxygen is released back into the atmosphere.
The carbon remains in the plant as biomass.
NB Phytoplankton in the oceans also produce oxygen, from dissolved CO2.
What else can I help you with?
Was the atmosphere of the earth always mostly nitrogen and oxygen?
No, the Nitrogen in the air has probably always been there (because nitrogen is rather inert), but originally Earths atmosphere was reducing (it had no free Oxygen) and probably contained large amounts of CO2 and hydrocarbons. The present atmosphere on Earth is the product of biological processes which have slowly introduced free Oxygen into the Oceans and then the atmosphere - life made Earth habitable for life!
What part of the earths sphere is composed of a mixture of gases?
the entire atmosphere...
What are the 2 top abundant elements in the earth's atmosphere?
The two most abundant elements in Earth's atmosphere are nitrogen and oxygen. Nitrogen makes up about 78% of the atmosphere, while oxygen is around 21%. Both of these elements are essential for supporting life on Earth.
What percent of the Earths atmosphere isn't nitrogen or oxygen?
About 1% (one percent). This 1% contains the noble(inert) gases, water vapour, carbon dioxide, sulphur dioxide, methane, ozone and ammonia. Of this 1% about one part in 3 billion is CO2. Its percentage value in the atmosphere is very, very low.
How did the earths atmosphere used to be?
Very early it would have been mainly hydrogen & helium, then the sun lit up (fusion started) and they would have been lost leaving mostly Argon & nitrogen with traces of stuff from volcanic out-gassing: H2O, CO2, SO2, H2S, & HCl. After life formed there would have been methane, but not until after chlorophyll was invented was there any oxygen.
Which gas in earth atmosphere tells us that there is life on earth?
oxygen
Which gas in the atmosphere tells us there's life on earth?
Oxygen
Why is is earths atmosphere important?
The earth's atmosphere is important as it contains the life saving ozone layer. It protects the earth against the harmful UV radiations of the sun.
What essentials for life are found in earths atmosphere?
The Earth's atmosphere contains oxygen, which is essential for respiration in most living organisms. It also contains carbon dioxide, which plants use for photosynthesis to produce food. Water vapor in the atmosphere is essential for the water cycle, which is vital for all forms of life on Earth.
What factor allow life to exist on earth?
some factors that allow life to existon earth is that earths atmosphere is just right.
How does Earths atmosphere affect life on Earth?
The "ozone", as we call it, exists in the stratosphere of our atomoshpere. The ozone protects life from ultraviolet radiation from the sun.
Why is the Earths atmosphere needed for life?
The Earth's atmosphere is necessary for life because it contains oxygen for respiration, regulates temperature, protects against harmful rays from the sun, and provides the air we breathe. Without the atmosphere, conditions on Earth would be too extreme for life to exist.
Which gas in Earth's atmosphere suggests that there is life on Earth?
The presence of oxygen in Earth's atmosphere suggests there is life on Earth. Oxygen is produced primarily by plants and certain bacteria through the process of photosynthesis. Its abundance indicates the ongoing presence of life forms that release oxygen as a byproduct of their metabolic processes.
Earths position in the atmosphere?
Earth's atmosphere is the layer of gases that surrounds the planet. It consists of different layers, with the troposphere being the closest to the surface where weather occurs. Earth's position within the atmosphere allows it to support life by providing the necessary elements for living organisms to thrive.
Is oxygen found outside earths atmosphere?
Yes. Earth's atmosphere is about 21% oxygen. Without it, the vast majority of life we see, including humans, could not exist.
Makes up 21 percent of the atmosphere?
Oxygen makes up 21% of the Earths atmosphere.
What element compromises half earths atmosphere?
Nitrogen compromises half of Earth's atmosphere, with oxygen making up most of the rest. Both nitrogen and oxygen are essential gases for supporting life on Earth.
