Question 28

The layer of Earth's atmosphere that contains the ozone layer is the Stratosphere.

The Stratosphere is the layer of Earth's atmosphere where the ozone layer is located, playing a crucial role in absorbing the majority of the sun's harmful ultraviolet radiation.

A) Mesosphere

The Mesosphere is located above the Stratosphere and below the Thermosphere. It does not contain the ozone layer, which is specifically found in the Stratosphere, making this option incorrect.

B) Thermosphere

The Thermosphere is situated above the Mesosphere and is characterized by high temperatures due to solar activity. However, it lacks the ozone layer, which is confined to the Stratosphere, thus making this option incorrect.

C) Stratosphere

The Stratosphere is the correct answer as it contains the ozone layer, which is essential for protecting life on Earth from harmful UV radiation. This layer is situated above the Troposphere and below the Mesosphere, confirming its role in atmospheric structure.

D) Exosphere

The Exosphere is the outermost layer of Earth's atmosphere, where the atmosphere transitions into space. It does not contain the ozone layer, which is located much lower in the Stratosphere, rendering this option incorrect.

Conclusion

The Stratosphere is definitively the layer of Earth's atmosphere that contains the ozone layer, providing essential protection from UV radiation. The other options—Mesosphere, Thermosphere, and Exosphere—do not contain the ozone layer, making them incorrect choices in this context.