Science
What is ozone ? How is it formed in the upper layers of the Earth's atmosphere ? How does ozone affect our ecosystem ?
Environment
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Answer
Ozone is a gas which is formed when an oxygen molecule (O2) combines with another oxygen atom (O). Thus, Ozone (O3) is a molecule formed by three atoms of oxygen.
At the higher levels of the atmosphere, UV radiation acts on oxygen (O2) molecule. The higher energy UV radiations split apart some molecular oxygen (O2) into free oxygen (O) atoms. These atoms then combine with the molecular oxygen to form ozone.
O2 O + O
O2 + O ⟶ O3
Ozone is present at the higher levels of the atmosphere and it shields the surface of the earth from ultraviolet (UV) radiation of the Sun. Therefore, it helps to protect all ecosystems/organisms from highly damaging radiations that can cause problems like skin cancer and cataract in humans and potential damage to some marine organisms and plants. Ozone also helps to maintain the temperature of earth.
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