Question

Which two forms of oxygen are found in the atmosphere?
(a) water and ozone
(b) water and oxygen
(c) ozone and oxygen

Answer 1

(c) ozone and oxygen

Elemental oxygen is normally found in the form of a diatomic molecule. However, in the upper reaches of the atmosphere, a molecule containing three atoms of oxygen is found, which is called as ozone.

The presence of oxygen in the air (atmosphere) is essential for the following:
1. The life processes such as respiration, in all living organisms.
2. Combustion of fuels.

The presence of ozone in the air (atmosphere) is essential for the following:
1. Ozone is a gas in the atmosphere that protects everything living on the Earth from harmful ultraviolet (UV) rays from the Sun.