Atmospheric Layers

How does the depth of the troposphere vary?

• It remains constant.

• It varies with latitude and season.

• It decreases with altitude.

• It increases with temperature.

Which statement(s) is true about the stratosphere? Click all that apply.

• The temperature of the lower stratosphere is about -60°C.

• The upper stratosphere is colder than the lower stratosphere.

• The middle portion of the stratosphere contains a layer of ozone.

• The ozone in the stratosphere reflects energy from the sun.

Which statement(s) is true about the mesosphere? Click all that apply.

• It contains the ozone layer.

• It contains the coldest part of the atmosphere.

• It protects Earth's surface from being hit by most meteoroids.

• It ends at 320 kilometers above sea level.

Why is the thermosphere so hot?

• It absorbs high-energy solar radiation.

• It is closer to the sun.

• It has a high concentration of greenhouse gases.

• It is heated by volcanic activity.

Brilliant light displays that occur in the ionosphere are called the _______.

• Aurora Borealis

• Aurora Australis

• St. Elmo's Fire

• Lightning

The highest temperatures in the atmosphere occur in the _______.

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

• Exosphere

Temperatures generally rise as altitude increases in the _______ and _______ layers of the atmosphere.

• Troposphere and Stratosphere

• Stratosphere and Thermosphere

• Mesosphere and Exosphere

• Troposphere and Mesosphere

Most meteoroids burn up in the _______.

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

The ionosphere lies between the mesosphere and _______.

• Exosphere

• Stratosphere

• Thermosphere

• Troposphere

Which layer of the atmosphere contains the ozone layer?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere