Earth's Lower Atmosphere and Climate Change

What is the main reason for the expansion of Earth's lower atmosphere?

• Increased solar activity

• Climate change

• Volcanic eruptions

• Ocean currents

The troposphere is the layer of the atmosphere where we live and breathe. True or False?

• True

• False

What is the upper boundary of the troposphere called?

• Stratosphere

• Mesosphere

• Tropopause

• Exosphere

Fill in the blank: The troposphere contains the most heat and ____, making it where a lot of atmospheric weather occurs.

• Light

• Moisture

• Dust

• Wind

What evidence supports the claim that greenhouse gases are altering our atmosphere?

• Increased volcanic activity

• Rising sea levels

• Expanding troposphere

• Melting glaciers

Fill in the blank: Air in the atmosphere expands when it's hot and ____ when it's cold.

• A) Rises

• B) Contracts

• C) Disappears

• D) Spreads

What is the main cause of the troposphere rising higher than ever before?

• Decreased solar activity

• Increased volcanic eruptions

• Rising greenhouse gases

• Ocean currents

Fill in the blank: Researchers paired atmospheric data with ____ data to show the troposphere is rising higher.

• GPS

• Satellite

• Radar

• Sonar

What is the rate of increase in the tropopause height between 2001 and 2020?

• 164 feet per decade

• 184 feet per decade

• 53.3 meters per decade

• 50 meters per decade

According to the study, what percentage of the total increase in atmospheric height is attributed to human activity?

• 50%

• 60%

• 70%

• 80%