What is the most abundant gas in Earth's atmosphere?

• Argon

• Carbon Dioxide

• Nitrogen

• Oxygen

Which two layers of the atmosphere are most important for understanding weather and ozone?

• Troposphere and Mesosphere

• Stratosphere and Thermosphere

• Troposphere and Stratosphere

• Mesosphere and Exosphere

In which layer of the atmosphere does the temperature increase due to the presence of ozone?

• Stratosphere

• Thermosphere

• Mesosphere

• Troposphere

What happens to air density as you move higher in the atmosphere?

• It fluctuates randomly

• It decreases

• It remains constant

• It increases

Which layer of the atmosphere is closest to outer space?

• Troposphere

• Stratosphere

• Mesosphere

• Exosphere