Layers of the Atmosphere

Which layer of the atmosphere is closest to the Earth's surface?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

What is the composition of the troposphere?

• 78% nitrogen, 21% oxygen, 1% other gases

• 78% oxygen, 21% nitrogen, 1% other gases

• 78% carbon dioxide, 21% oxygen, 1% other gases

• 78% helium, 21% nitrogen, 1% other gases

What is the temperature change in the troposphere as you go upward?

• The temperature increases

• The temperature remains constant

• The temperature decreases

• The temperature fluctuates

Which layer of the atmosphere contains the ozone layer?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

What is the function of the ozone layer?

• It protects us from comets and meteors

• It keeps the Earth warm

• It absorbs ultraviolet light rays

• It reflects back radio waves

Which layer of the atmosphere is the coldest?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

What is the temperature range in the mesosphere?

• 0 to -90 degrees Celsius

• -90 to -50 degrees Celsius

• -50 to 0 degrees Celsius

• 0 to 50 degrees Celsius

Which layer of the atmosphere is the hottest?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

What is the temperature range in the thermosphere?

• -90 to -50 degrees Celsius

• -50 to 0 degrees Celsius

• 0 to 50 degrees Celsius

• 500 to 1500 degrees Celsius

Which layer of the atmosphere is the outermost?

• Troposphere

• Stratosphere

• Mesosphere

• Exosphere