Troposphere

The troposphere is the lowest layer of the Earth's atmosphere, extending from the Earth's surface up to an average height of about 8 to 15 kilometers (5 to 9 miles). This layer is where the weather occurs and where most of the Earth's clouds and precipitation are found. It is also the layer in which we live and where most of the Earth's air mass is contained.

Key Characteristics of the Troposphere:

1. Temperature: The temperature in the troposphere generally decreases with altitude. This is due to the absorption of solar energy by the Earth's surface, which then warms the air closest to the surface. As you move higher in the troposphere, the air becomes cooler.
2. Pressure: The pressure in the troposphere also decreases with altitude. The air molecules are more densely packed closer to the Earth's surface, resulting in higher pressure. As you move higher in the troposphere, the pressure decreases.
3. Composition: The troposphere is primarily composed of nitrogen (about 78%) and oxygen (about 21%), along with trace amounts of other gases such as water vapor, carbon dioxide, and argon.
4. Weather and Clouds: The troposphere is where most of the Earth's weather phenomena occur, including the formation of clouds, precipitation (rain, snow, etc.), and the occurrence of storms and other atmospheric disturbances.

Study Guide for Troposphere:

1. What is the height range of the troposphere?
2. Explain why the temperature decreases with altitude in the troposphere.
3. Describe the composition of the troposphere.
4. Why is the troposphere important for weather and cloud formation?

[Troposphere] Related Worksheets and Study Guides:

• Earth's AtmosphereScience • Sixth Grade