Unit 3 Test Review

Which gas makes up the majority of Earth’s atmosphere?

• Nitrogen
• Oxygen
• Argon
• Helium

Which is NOT a reason that Earth’s atmosphere is important?

• It protects living things from ultraviolet radiation
• It burns up meteoroids which keeps them from hitting Earth
• It increases acid rain production
• It keeps Earth’s surface a comfortable temperature and helps water to remain a liquid

The ______________ is all of the air surrounding us.

• Atmosphere
• Lithosphere
• Hydrosphere
• Biosphere

The ______________ is all of the land/ earth part of earth on earth.

• Hydrosphere
• Lithosphere
• Atmosphere
• Biosphere

The ______________ is all of the water on earth.

• Biosphere
• Lithosphere
• Atmosphere
• Hydrosphere

The __________ is earth as a whole with all of the living organisms and their interactions with other systems.

• Lithosphere
• Atmosphere
• Biosphere
• Hydrosphere

Which layer of earth is the thickest?

• Inner Core
• Outer Core
• Mantle
• Crust

How many layers of the atmosphere are there?

• 3
• 5
• 4
• 6

The air we breathe is primarily composed of oxygen

• True
• False

Climate refers to the short-term conditions of the atmosphere, including temperature, precipitation, wind, and humidity

• True
• False