Thermosphere

The thermosphere is a layer of Earth's atmosphere that extends from about 80 kilometers (50 miles) to the exosphere, which is the outermost layer of the atmosphere. It is located above the mesosphere and below the exosphere. The thermosphere is named for its high temperature, but despite its name, it would not feel hot to a human because it is so near vacuum. The temperature in the thermosphere can reach up to 2,500 degrees Celsius (4,500 degrees Fahrenheit) due to the absorption of high-energy solar radiation.

Key Facts about the Thermosphere:

• The thermosphere is the layer of the Earth's atmosphere that is closest to outer space.
• It is characterized by high temperatures but low density of air molecules.
• The International Space Station orbits within the thermosphere.
• Auroras are often seen in the thermosphere due to the interaction of solar radiation with the gases in this layer.

Study Guide Questions:

1. What is the temperature range of the thermosphere?
2. Where is the thermosphere located in relation to the other layers of the atmosphere?
3. What is the main cause of the high temperatures in the thermosphere?
4. Which famous man-made structure orbits within the thermosphere?
5. What natural phenomena are often seen in the thermosphere?

Study Tips:

When studying the thermosphere, it can be helpful to create visual aids such as diagrams or charts to understand its position in relation to the other layers of the atmosphere. Additionally, practicing the key facts and their implications can aid in understanding and retention of the material.