What is the approximate height of the tropopause?
A. 100 km
B. 86 km
C. 50 km
D. 12 km
What is the approximate temperature of the tropopause?
A. -86 degrees C
B. -56 degrees C
C. -2 degrees C
D. 0 degrees
What is the approximate height of the stratopause?
A. 100 km
B. 86 km
C. 50 km
D. 12 km
What is the approximate temperature of the stratopause?
A. -86 degrees C
B. -56 degrees C
C. -2 degrees
D. 0 degrees C
What is the approximate height of the mesopause?
A. 100 km
B. 86 km
C. 50 km
D. 12 km
What is the approximate temperature of the mesopause?
A. -86 degrees
B. -56 degrees C
C. -2 degrees C
D. 0 degrees C
Does the temperature increase or decrease with altitude in the troposphere?
A. increase
B. decrease
Does the temperature increase or decrease with altitude in the stratosphere?
A. increase
B. decrease
Does the temperature increase or decrease with altitude in the mesosphere?
A. increase
B. decrease
Does the temperature increase or decrease with altitude in the thermosphere?
A. increase
B. decrease
The Correct Answer and Explanation is:
Here are the correct answers for each question followed by a comprehensive 300-word explanation:
Correct Answers:
- Height of the tropopause:
D. 12 km - Temperature of the tropopause:
B. -56 degrees C - Height of the stratopause:
C. 50 km - Temperature of the stratopause:
C. -2 degrees C - Height of the mesopause:
B. 86 km - Temperature of the mesopause:
A. -86 degrees C - Temperature trend in the troposphere:
B. decrease - Temperature trend in the stratosphere:
A. increase - Temperature trend in the mesosphere:
B. decrease - Temperature trend in the thermosphere:
A. increase
Explanation (300+ words):
Earth’s atmosphere is divided into four primary layers: troposphere, stratosphere, mesosphere, and thermosphere, each separated by boundaries called pauses: tropopause, stratopause, and mesopause. These pauses mark changes in temperature gradients.
The tropopause, located at about 12 km, is the boundary between the troposphere and the stratosphere. It marks the point where temperature stops decreasing with altitude. At this height, the temperature reaches around -56°C. The troposphere is the lowest layer where weather occurs, and due to its proximity to Earth’s surface and heat radiation from the ground, temperature decreases as altitude increases.
Above this is the stratosphere, where the temperature increases with height due to the absorption of ultraviolet (UV) radiation by the ozone layer. This continues up to the stratopause at about 50 km, where the temperature levels off around -2°C.
Next is the mesosphere, where temperature again decreases with altitude. It reaches the mesopause at about 86 km, one of the coldest places in Earth’s atmosphere, with temperatures plunging to about -86°C.
Above that lies the thermosphere, where the temperature increases rapidly with height due to intense solar radiation being absorbed by sparse molecules. Despite high temperatures (which can exceed 1000°C), it wouldn’t feel hot due to the thin air and low molecular density.
Each layer’s temperature behavior is driven by how solar energy is absorbed. In the troposphere and mesosphere, heat sources are below, causing cooling with height. In the stratosphere and thermosphere, heat sources (UV and solar radiation absorption) are within or above the layer, causing warming with altitude.
Understanding these patterns is essential for meteorology, aviation, and space science.