What is the third layer in the atmosphere?

What is the third layer in the atmosphere?

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

Answer: (A)

Atmospheric layers are described in order from the surface upward as the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. The third layer from the surface is the mesosphere, sitting above the stratosphere and below the thermosphere. This region is where most meteors burn up as they enter Earth’s atmosphere, and temperatures tend to get colder with increasing altitude, reaching very low values near the top of the layer. The stratosphere is the second layer and contains the ozone layer, which causes a temperature rise with height due to ozone absorption. The ionosphere is not a distinct, fixed layer but a zone of ionized particles that spans the upper mesosphere and thermosphere and is important for radio communication.

Atmospheric layers are described in order from the surface upward as the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. The third layer from the surface is the mesosphere, sitting above the stratosphere and below the thermosphere. This region is where most meteors burn up as they enter Earth’s atmosphere, and temperatures tend to get colder with increasing altitude, reaching very low values near the top of the layer. The stratosphere is the second layer and contains the ozone layer, which causes a temperature rise with height due to ozone absorption. The ionosphere is not a distinct, fixed layer but a zone of ionized particles that spans the upper mesosphere and thermosphere and is important for radio communication.