All about Air

All about Air Air supports life on earth

Air supports life on earth. Air helps in the scattering of seeds and pollens of plants. Animals use air for respiration. Plants use air to prepare their food. Air is present everywhere. Atmosphere is a thin layer of air surrounding the earth. The atmosphere is dense at the surface of the earth and becomes thinner as one moves up. Air is: Transparent Colourless Occupies space The movement of air is called breeze or wind depending on its velocity or speed. The following are the various components of air: Nitrogen Oxygen Carbon dioxide Water vapour Smoke and dust particles

Nitrogen Is the major component of air Does not support burning Oxygen: Is the second largest component present in air Supports burning Smoke and dust particles present in air are harmful for the body. Animals and humans breathe in oxygen and give out carbon dioxide during respiration. Plants taken in carbon dioxide present in the atmosphere to make food and release oxygen into the atmosphere.