We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.
Chemistry

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

What are the Components of Air?

Michael Anissimov
By
Updated: May 21, 2024
Views: 104,002
Share

There are five major components of air: nitrogen (78.0842%), oxygen (20.9463%), water vapor (about 1%), argon (0.93422%), and carbon dioxide (0.03811%). Trace components make up another 0.002%. Out of all these substances, the one that animals (including humans) need to survive is oxygen, while plants require carbon dioxide and nitrogen.

The respiration of animals consumes oxygen and produces carbon dioxide as a byproduct, while plants consume carbon dioxide and produce oxygen. The world's ecosystems depend on this balance. The components of air may be altered by human activity, such as the burning of fossil fuels, which has increased the proportion of carbon dioxide in the atmosphere.

Air has been a subject of study for scientists for hundreds of years. Like other gases, air behaves according to Boyle's Law, which states that the pressure and volume of a gas are inversely proportional in a closed system where the total quantity of gas and its temperature remain fixed. This means that a person can decrease the volume of air by compressing it, but its pressure will increase proportionally.

It is possible to pump air into an elastic membrane, like a balloon, to inflate it. Because the pressure exerted outwards by the air inside a balloon is roughly equivalent to the pressure exerted on the balloon by the outside, it remains inflated. This only holds true when the air pressure of the air originally put in the balloon is similar to the ambient air around it, however. If a balloon is filled with air from the upper atmosphere, then brought down to sea level, it will shrink, while if it filled with air from sea level and brought to a very high altitude, it will pop. This is what happens to balloons that are accidentally released into the sky.

Air remains in the Earth's atmosphere because the gravity of the Earth is sufficient to hold gas particles close to its surface. Lighter gases, such as hydrogen, have long ago escaped from the Earth's pull, being light enough that thermal excitation is sufficient to them to escape away into space.

Share
All The Science is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Michael Anissimov
By Michael Anissimov
Michael Anissimov is a dedicated All The Science contributor and brings his expertise in paleontology, physics, biology, astronomy, chemistry, and futurism to his articles. An avid blogger, Michael is deeply passionate about stem cell research, regenerative medicine, and life extension therapies. His professional experience includes work with the Methuselah Foundation, Singularity Institute for Artificial Intelligence, and Lifeboat Foundation, further showcasing his commitment to scientific advancement.
Discussion Comments
By anon1001012 — On Feb 17, 2019

Boyles law can only be applied to a closed system.

That means an enclosed space i.e. a barrier preventing the gas escaping outside (the system).

In reality, the atmosphere would be instantly blown out into the infinite vacuum of space if what we are told by space agencies was true.

Do your own research. The truth is stranger than you can possibly imagine.

By pastanaga — On Feb 16, 2013

@anon130321 - I think that there probably is some tiny amount of hydrogen lost to space, but it's probably not a huge amount.

Hydrogen is very reactive so if it did get released into the atmosphere, it would quickly bond with oxygen and become more water. I imagine the hydrogen that is talked about in the article probably escaped before the layer of oxygen developed, as that layer only developed relatively recently in terms of the Earth's existence so far.

By irontoenail — On Feb 15, 2013

I recently heard of a study that likened people in a crowd to the molecules in a gas, and mentioned Boyles law. It was a study done in order to reduce the damage that can happen in places with massive crowds, like a concert.

They found that the same kind of rule applies, where, if the people are crowded into a smaller space, the pressure increases. Which sounds kind of obvious when you put it like that, but they are hoping by putting it into real calculations they will be able to reduce the numbers of deaths that occur from trampling and so forth by arranging the areas more efficiently.

By anon130321 — On Nov 28, 2010

Is there a fixed amount of water on the planet or is there natural process by which some of it is broken into it's constituent gases, allowing free hydrogen to escape from Earth's gravity?

By Amphibious54 — On Sep 23, 2010

@ anon23898- Climate is affected by the relative composition of the greenhouse gases. The greenhouse gases are water vapor, nitrous oxide, ozone, methane and carbon dioxide. These compounds play the role of absorbing and emitting solar and heat radiation. Too much of these compounds can block the transmission of gases back into space, causing the planet to heat up. Too few of other greenhouse gases like ozone can cause a situation where not enough solar radiation is blocked, leaving the earth's surface vulnerable to the sun’s ultraviolet radiation.

Greenhouse gases are not all bad. If these greenhouse gases did not protect the earth, too much radiation would escape back into space and cause the earth's temperature to plummet. If we did not have these greenhouse gases, the earth's temperature would be about 60 degrees Fahrenheit cooler, making it uninhabitable for humans.

By anon23898 — On Jan 04, 2009

what are the components that affect the climate of an ecosystem?

Michael Anissimov
Michael Anissimov
Michael Anissimov is a dedicated All The Science contributor and brings his expertise in paleontology, physics, biology...
Learn more
Share
https://www.allthescience.org/what-are-the-components-of-air.htm
Copy this link
All The Science, in your inbox

Our latest articles, guides, and more, delivered daily.

All The Science, in your inbox

Our latest articles, guides, and more, delivered daily.