Question

How does the atmosphere protect us from ultraviolet rays?

Answer 1

Atmosphere:

1. The atmosphere is a blanket of gases that covers the planets.
2. It stays close to the planet's surface by the planet's gravitational pull.
3. Some of the commonly found gases in the atmosphere are Nitrogen, Oxygen, and Argon.

The atmosphere protects us from ultraviolet rays:

1. The ozone layer is the top region of the stratosphere.
2. It acts as a shield and protects us from ultraviolet radiation.
3. The ozone molecule absorbs UV-B radiation from the sun and it splits into an oxygen molecule (O₂) and an individual oxygen (O) atom.
4. The O₂ and O molecules react further and form new ozone (O₃) molecules.
5. Exposure to UV-B radiation can cause sunburns and prolonged exposure to UV-B is fatal for living organisms.