Air | Composition, Oxygen, Nitrogen | Britannica
Nov 5, 2024 · Air, mixture of gases comprising the Earth’s atmosphere. The mixture contains a group of gases of nearly constant concentrations and a group with concentrations that are variable in both space and time. The atmospheric gases of steady concentration (and their proportions in percentage by volume)
Air - Simple English Wikipedia, the free encyclopedia
Air is a mixture of many gases and tiny dust particles. It is the clear gas in which living things live and breathe. It has an indefinite shape and volume. It has mass and weight, because it is matter. The weight of air creates atmospheric pressure. There is no air in outer space.
10 Interesting Things About Air - NASA Climate Kids
Sep 25, 2024 · The air in our atmosphere acts as insulation, keeping the Earth from getting too cold or too hot. Ozone, another type of gas in the air, also protects us from too much sunlight. Air in the atmosphere can also protect us from meteoroids.
Air - National Geographic Society
Oct 1, 2024 · Air is the invisible mixture of gases that surrounds Earth. Air contains important substances, such as oxygen and nitrogen, that most species need to survive.
What's in the Air? - Center for Science Education
Air is a mixture of gases, most of which are naturally occurring. Air also contains a significant amount of human-made air pollutants, including some that are not safe to breathe and some that are causing the climate to warm.
Air Definition & Meaning - Merriam-Webster
The meaning of AIR is the mixture of invisible odorless tasteless gases (such as nitrogen and oxygen) that surrounds the earth; also : the equivalent mix of gases on another celestial object (such as a planet).
air - Kids | Britannica Kids | Homework Help
In addition to nitrogen and oxygen, air consists of small amounts of the gases argon, neon, helium, and methane. Besides gases, air also contains water vapor, dust, pollen, and bacteria. The water vapor in air is the source of rain and snow. The oxygen in air comes from plants.
The Chemical Composition of Air - ThoughtCo
Jul 29, 2024 · Nearly all of Earth's atmosphere (air) is comprised of a mere five gases: nitrogen, oxygen, water vapor, argon, and carbon dioxide. Several other compounds are also present in our air in trace amounts. Below is a summary of the chemical composition of Earth's atmosphere.
Components of Air - Oxygen, Nitrogen, Carbon dioxide, Water …
The mixture of gases that makes up the Earth’s atmosphere is known as air. Nitrogen makes up 78 % of this gas, which is mixed with oxygen (21%), water vapour (variable), argon (0.9 %), carbon dioxide (0.04%), and trace gases. There is no apparent scent or colour in pure air. Dust, pollen, and spores are common contaminants in the air ...
What is Air? Definition, Uses, and Examples | Composition Of Air
Jun 25, 2021 · Air is not just one substance. Like seawater which is a mixture of many substances, the air is also a mixture of gases. The air around us contains four major gases, namely nitrogen, oxygen, carbon dioxide, and argon. …