Mesosphere
The mesosphere is the third layer of the Earth's atmosphere, located above the stratosphere and below the thermosphere. It extends from about 50 kilometers (31 miles) to 85 kilometers (53 miles) above the Earth's surface.
Characteristics of the Mesosphere:
- Temperature: The temperature in the mesosphere decreases with increasing altitude, reaching extremely low temperatures as low as -90°C (-130°F).
- Atmospheric Pressure: The atmospheric pressure in the mesosphere is much lower compared to the pressure at the Earth's surface.
- Composition: The mesosphere is composed mainly of oxygen and nitrogen molecules, similar to the composition of the other layers of the atmosphere.
- Atmospheric Phenomena: The mesosphere is the layer where meteors burn up, creating visible streaks of light known as "shooting stars". It is also the layer where noctilucent clouds, the highest clouds in the Earth's atmosphere, form.
Key Concepts to Remember:
- Temperature: The mesosphere is characterized by extremely low temperatures.
- Atmospheric Pressure: The pressure in the mesosphere is lower compared to the Earth's surface.
- Atmospheric Phenomena: Meteors burning up and noctilucent clouds are unique phenomena associated with the mesosphere.
Study Tips:
When studying the mesosphere, it's important to understand the temperature and atmospheric phenomena that are unique to this layer. Use visual aids, such as diagrams and videos, to better comprehend the concepts related to the mesosphere. Additionally, make sure to review the differences in temperature and pressure between the mesosphere and other layers of the atmosphere.
Understanding the mesosphere is essential for comprehending the Earth's atmosphere and its role in supporting life on our planet.
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