Earth's Atmosphere - Unit Test REVIEW

78% of the Earth's atmosphere is ___________ and 21% of the Earth's atmosphere is _____________.

• Oxygen, Nitrogen

• Nitrogen, Oxygen

• Nitrogen, Carbon Dioxide

• Oxygen, Carbon Dioxide

Warm air _________ and cool air ___________.

• rises/sinks
• sinks/rises

what does the #4 show in the diagram?

• condensation
• evaporation
• precipitation
• run off

Runoff is represented by which arrow?

• 1

• 2

• 3

• 4

In what layer of the atmosphere do all weather events occur?

• Stratosphere

• Thermosphere

• Mesosphere

• Troposphere

In which layer of the atmosphere is cold and protects from meteors and astroids?

• Mesosphere
• Thermosphere
• Stratosphere
• Troposphere

Which layer protects Earth from solar winds?

• ozonosphere

• ionosphere

• exosphere

• magnetosphere

Why is the ozone layer vital to life on Earth?

• Planes fly in the ozone layer

• It is made up of oxygen (O₂)

• It shields the Earth from ultraviolet (UV) rays from the sun

• It causes clouds to be created

In the troposphere, the temperature _____ as altitude increases.

• Increases

• Decreases

• Stays the same

• Goes up and down

This vitally important layer is located in the stratosphere?

• ozonosphere

• ionosphere

• exosphere

• magnetosphere