Atmosphere

Which layer of the atmosphere do we live in?

• Troposphere

• Mesosphere

• Thermosphere

• Stratosphere

Which atmosphere layer contains the Aurora Borealis?

• Troposphere

• Mesosphere

• Thermosphere

• Stratosphere

Which atmosphere layer protects living things from the Sun's UV radiation?

• Troposphere

• Mesosphere

• Thermosphere

• Stratosphere

In which atmosphere layer does weather occur?

• Exosphere

• Troposphere

• Mesosphere

• Stratosphere

Which elemental gas makes up around 80% of the Earth's atmosphere?

• Hydrogen

• Nitrogen

• Oxygen

• Helium

Generally, as altitude increases, what happens to air pressure?

• It increases.

• It decreases.

• It stays the same.

• It changes within each atmosphere layer.

Which atmosphere layer contains the Ozone Layer?

• Stratosphere

• Troposphere

• Mesosphere

• Exosphere

Why is it difficult to breathe at higher altitudes?

• There is less oxygen as altitude increases.

• There is a larger amount of carbon dioxide as altitude increases.

• Gases in the atmosphere become thinner as altitude increases.

• It is difficult to breathe cold air.

The hottest layer of the atmosphere:

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

The mixture of gases that surrounds Earth is the ______________.

• atmosphere

• stratosphere