Chapter 12 Earth's Atmosphere

Multiple Choice

Why is the atmosphere essential for life on Earth?

• It supports life by protecting from harmful radiation, controls weather and climate, and provides necessary gases.

• It only provides oxygen for breathing.

• It is responsible for the color of the sky.

• It makes Earth heavier.

Multiple Choice

Which gas makes up the largest percentage of Earth's atmosphere?

• Oxygen

• Nitrogen

• Argon

• Carbon dioxide

Multiple Choice

Which of the following statements about atmospheric density is correct?

• Atmospheric density increases with altitude.

• Atmospheric density is the same at all altitudes.

• Atmospheric density decreases with altitude.

• Atmospheric density is not affected by altitude.

Multiple Choice

Which layer of the atmosphere is where most weather events occur?

• Stratosphere

• Troposphere

• Mesosphere

• Thermosphere

Multiple Choice

Which boundary separates the troposphere from the stratosphere?

• Tropopause

• Stratopause

• Mesopause

• Thermopause

Multiple Select

Which of the following are characteristics of the troposphere?

• Most atmospheric air is found here

• Air temperature increases with height

• Virtually all weather occurs here

• Ozone layer is found here

Multiple Choice

Which type of cloud is described as high level, wispy, and composed of ice crystals?

• Cirrus

• Cumulus

• Stratus

• Nimbus

Multiple Choice

Which layer of the atmosphere absorbs solar radiation and protects the Earth from harmful UV rays?

• Mesosphere

• Ozone Layer

• Exosphere

• Magnetosphere

Multiple Select

Which of the following statements about the ionosphere are correct?

• It is included in both the mesosphere and thermosphere.

• It absorbs ultraviolet and X-ray radiation from the sun.

• Particles in this layer become electrically charged (ions).

• It is the coldest layer of the atmosphere.

Multiple Choice

What is the main function of the magnetosphere in relation to harmful particles from the sun?

• It absorbs solar radiation.

• It traps harmful particles from the sun.

• It increases the temperature of the atmosphere.

• It creates the ozone layer.

Multiple Choice

What are the main purposes of Earth's atmosphere?

• To support life by protecting from electromagnetic radiation, control weather and climate, and provide gases for breathing

• To create landforms and mountains

• To generate electricity for human use

• To produce minerals and metals