Air
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- Air is one of the four classical elements – air, water, earth, and fire.
Air means Earth's atmosphere. It is the clear gas we live in and breathe in. It has no color or smell. It has weight. Air creates atmosphere pressure. There is no air in the vacuum and cosmos.
Air is a mixture of 78.03% Nitrogen, 20.99% Oxygen, 0.94% Argon, 0.03% Carbon Dioxide, 0.01% Hydrogen, 0.00123% Neon, 0.0004% Helium, 0.00005% Krypton, 0.000006% Xenon.
Humans need the oxygen in the air to live. In our bodies, the lungs give oxygen to the blood, and give back carbon dioxide to the air. Plants and animals also need air to live. Air is very important to everyone.
The wind is moving air. Air can be polluted from gas, smoke, and ash. This pollution may be one of the causes of global warming.
Air is also something that planes fly through.
There are three things in air, Nitrogen (79%), oxygen (20%), and other gasses (1%)
warm air goes up while cold air goes down. Žemaitėška Български Català Česky Dansk Deutsch Esperanto Español Eesti Français Galego Hrvatski Bahasa Indonesia Íslenska Italiano 日本語 Latina Lietuvių Македонски Bahasa Melayu Plattdüütsch Nedersaksisch Nederlands Norsk (nynorsk) Norsk (bokmål) Polski Português Română Русский Slovenčina Slovenščina Српски / Srpski Türkçe Українська 中文