Which gas is the major constituent of the atmosphere?

Which gas is the major constituent of the atmosphere?

At a height of about 86 kilometers, the three main gaseous elements, which together account for about 99.9% of the total atmosphere, exist in essentially constant proportion to the total: nitrogen comprises 78% of the air by volume, oxygen comprises 21% of the air by volume, and argon comprises another 0.9%. However, due to its presence in large quantities, nitrogen does have a significant effect on the behavior of other gases.

Gases are molecules that can be either gaseous or liquid at room temperature. The major gas in the atmosphere is nitrogen (78%), followed by oxygen (21%). Other gases include hydrogen (1%), helium (0.5%) carbon dioxide (about 0.04%), water vapor (about 0.002%), nitrous oxide (about 0.0004%), ozone (about 0.00004%). Altogether, these other gases make up only one ten-thousandth of the atmosphere.

Nitrogen has an important role in the atmosphere. First, it is the most abundant element by weight (after hydrogen) and is therefore responsible for most of the mass of the atmosphere. Second, because it is chemically active, it can form bonds with other substances forming stable compounds that may become clouds condensation nuclei or ice particles. For example, nitrogen forms proteins cells membranes, and DNA; it is also necessary for the formation of ammonia, which is used as a fertilizer and also contributes to cloud formation.

What are the primary elements that make up Earth’s atmosphere?

The Earth's atmosphere is made up of around 78% nitrogen, 21% oxygen, 0.9 percent argon, and 0.1 percent other gases. The remaining 0.1 percent is made up of trace quantities of carbon dioxide, methane, water vapor, and neon.

Earth's atmosphere has been known to have various effects on its inhabitants, from providing protection from deadly radiation to permitting life as we know it on Earth. However, our atmosphere also contains elements that can be harmful to humans if they enter our body through small cuts or pores. Certain chemicals in our atmosphere can also cause or contribute to certain diseases.

There are several different layers that make up Earth's atmosphere. The lowest layer is called the troposphere. This is where most weather occurs. It extends from the surface of the planet to about 10-15 miles (16-24 km) above sea level. The next layer is called the stratosphere. This begins at about 15 miles (24 km) above sea level and stretches out to about 50 miles (80 km). The stratosphere is very cold compared to the troposphere because there are no clouds or heaters present to melt ice or evaporate water. Thus, any moisture contained within this layer will usually freeze at night and dissipate during the day when temperatures drop enough.

The third layer is called the mesosphere.

What is the composition of the atmosphere?

The composition of air

  • Nitrogen — 78 percent.
  • Oxygen — 21 percent.
  • Argon — 0.93 percent.
  • Carbon dioxide — 0.04 percent.
  • Trace amounts of neon, helium, methane, krypton and hydrogen, as well as water vapor.

What are the gases found in each layer of the atmosphere?

The Gases in the Earth's Atmosphere Nitrogen and oxygen are by far the most prevalent; dry air is composed of around 78% nitrogen (N2) and 21% oxygen (O2). Argon, carbon dioxide (CO2), and many other gases are also present in considerably lower concentrations; each makes up less than 1% of the atmosphere's gas composition.

These gases are responsible for making the atmosphere what it is today: a protective layer that surrounds our planet and allows life as we know it to exist. Without this gas canopy above us, the Earth would be like Mars: a cold, barren place without water or any kind of environment that could support life as we know it.

Nitrogen and oxygen are the only gases that are stable under high temperatures and pressures found deep within the Earth. All other gases are either gaseous at standard temperature and pressure (gas phase), or a liquid at standard temperature and pressure (liquid phase). Some gases can transition between the two states as heat or pressure changes occur.

As air rises through the atmosphere, different layers of the atmosphere will have different compositions due to differences in temperature and pressure. This is why you often find distinct chemical signatures in the atmosphere above different geographical locations or at various times of year.

Chemical reactions between gases inside the Earth and those coming from below combine to form new chemicals that cannot be obtained simply by combining the elements on their own.

What gases make up the earth’s atmosphere?

The air in the Earth's atmosphere is composed of roughly 78% nitrogen and 21% oxygen. Air also contains trace quantities of a variety of other gases, including carbon dioxide, neon, and hydrogen. The Earth's atmosphere affects everyone who lives on it, either directly or indirectly.

The most important effect that the atmosphere has on humans is through its role in providing protection from meteoroids and radiation. Humans need clouds to reflect solar energy away from the planet so that life can exist on land and sea. Without these clouds, heat would melt any ice that may be present, causing water supplies to diminish and oceans to expand, which would lead to mass extinction of much of the living world. Solar radiation passes through the atmosphere and impacts the surface, where it is reflected back into space or absorbed by Earth's surface.

Another important effect of the atmosphere is its role in regulating the temperature on Earth. Clouds act as shades for buildings and vehicles, preventing heat from reaching the ground. They also protect plants and animals from harmful ultraviolet rays. Without clouds, temperatures would rise higher than they do today.

Gases play an important role in determining how this reflection changes over time. The composition of the atmosphere is always changing due to natural processes such as evaporation and condensation and human activities such as burning fossil fuels.

About Article Author

Richard Craig

Richard Craig is a freelance writer and blogger who loves all things nature and wildlife. He has an interest in conservation, climate change, and sustainability, which he covers in his writing. Richard spends his free time hiking in the woods, camping in the wilderness, and exploring other nature-filled locales.


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