Question

The zone of atmosphere in which the ozone layer is present is called:

• A. Mesosphere
• B. Stratosphere
• C. Troposphere
• D. Ionosphere

Answer 1

The Correct Option is B

The question asks about the zone of the atmosphere where the ozone layer is present. The correct answer is the "Stratosphere." Let's explore this further:

1. Understanding the Atmosphere Layers:
   • Troposphere: This is the lowest layer of the atmosphere, where weather phenomena like rain and storms occur. It extends up to about 8-15 km above the Earth's surface.
   • Stratosphere: Located above the troposphere, it extends from about 15 km to 50 km above the Earth's surface. This layer houses the ozone layer, which protects life on Earth by absorbing most of the Sun's harmful ultraviolet radiation.
   • Mesosphere: Above the stratosphere, extending from about 50 km to 85 km. It's the layer where meteoroids burn up upon entering Earth's atmosphere.
   • Ionosphere: This is a part of the thermosphere, and it's important for radio communication because it reflects radio waves back to Earth.
2. Role of the Ozone Layer:
   • The ozone layer, found within the stratosphere, plays a crucial role in absorbing the majority of the sun's damaging ultraviolet rays.
   • It helps in preventing these rays from reaching the Earth's surface, thereby protecting living organisms from potential harm such as skin cancer and cataracts, and preserving ecological balance.
3. Eliminating Other Options:
   • Troposphere: Incorrect, as it contains weather patterns but no ozone layer.
   • Mesosphere: Incorrect, this layer is higher up and contains no ozone.
   • Ionosphere: Incorrect, focused more on radio wave propagation, occurring above the stratosphere.

Therefore, the correct answer is that the ozone layer is present in the Stratosphere.