Unit 4: Atmosphere Review

Front

What is the ozone layer?

Back

The ozone layer is a region of Earth's stratosphere that contains a high concentration of ozone (O₃) molecules, which absorb most of the sun's harmful ultraviolet (UV) radiation.

Front

What percentage of the ozone layer is found in the troposphere?

Back

10% of the ozone layer is found in the troposphere.

Front

What causes the high temperatures in the thermosphere?

Back

The high temperatures in the thermosphere are caused by the absorption of X-rays and gamma rays from the sun.

Front

Which layer of the atmosphere absorbs UV light?

Back

The ozone layer is mainly located in the stratosphere, which absorbs UV light.

Front

Are fossil fuels renewable or nonrenewable resources?

Back

Fossil fuels are nonrenewable resources.

Front

What is the main function of the stratosphere?

Back

The stratosphere contains the ozone layer, which protects life on Earth by absorbing harmful UV radiation.

Front

What are the main components of the atmosphere?

Back

The main components of the atmosphere are nitrogen (78%), oxygen (21%), argon (0.93%), and carbon dioxide (0.04%).

Front

What is the difference between the troposphere and the stratosphere?

Back

The troposphere is the lowest layer of the atmosphere where weather occurs, while the stratosphere is above it and contains the ozone layer.

Front

What is the significance of the thermosphere?

Back

The thermosphere is significant because it contains the ionosphere, which is important for radio communication and reflects radio waves back to Earth.

Front

How does the atmosphere protect life on Earth?

Back

The atmosphere protects life on Earth by filtering harmful solar radiation, regulating temperature, and providing essential gases for respiration.