Question

How is ozone layer formed ? State its importance to all life forms on
earth? Why the amount of ozone in the atmosphere dropped sharply in
the 1980s ?​

Answer 1

Answer:

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Explanation:

Stratospheric ozone is formed naturally by chemical reactions involving solar ultraviolet radiation (sunlight) and oxygen molecules, which make up 21% of the atmosphere. In the first step, solar ultraviolet radiation breaks apart one oxygen molecule (O2) to produce two oxygen atoms.But in the early 1980s, through a combination of ground-based and satellite measurements, scientists began to realize that Earth's natural sunscreen was thinning dramatically over the South Pole each spring. This thinning of the ozone layer over Antarctica came to be known as the ozone hole.

Answer 2

Explanation:

The chemical formula of ozone is O3. In the earth's stratosphere, ozone is formed from a two-step reactive process. First, sunlight breaks apart an oxygen molecule (O2 you'll recall) into two oxygen atoms. In the second step, these oxygen atoms collide with another oxygen atom to make ozone..

Ozone protects the Earth from harmful ultraviolet (UV) rays from the Sun. Without the Ozone layer in the atmosphere, life on Earth would be very difficult. Plants cannot live and grow in heavy ultraviolet radiation, nor can the planktons that serve as food for most of the ocean life.

Ozone depletion occurs when chlorofluorocarbons (CFCs) and halons—gases formerly found in aerosol spray cans and refrigerants—are released into the atmosphere (see details below). ... CFCs and halons cause chemical reactions that break down ozone molecules, reducing ozone's ultraviolet radiation-absorbing capacity