Earth's Atmosphere

What two gases make up the majority of air?

• helium & argon
• helium & oxygen
• ozone & nitrogen
• nitrogen & oxygen

Where do the four seasons occur?

• Stratosphere
• Thermosphere
• Troposphere
• Mesosphere

The BEST description of the troposphere is the layer of the atmosphere with the

• most ozone.

• greatest density.

• highest altitude.

• coldest temperature.

In which layer of Earth’s atmosphere does weather occur?

• mesosphere

• stratosphere

• thermosphere

• troposphere

What gas makes up approximately 21% of Earth's Atmosphere?

• Nitrogen

• Oxygen

• Ozone

• None of the Above

Which layer of the atmosphere contains the ozone?

• Troposphere

• Mesosphere

• Stratosphere

• Exosphere

In what layer of the atmosphere do most meteorites burn up?

• Stratosphere

• Thermosphere

• Troposphere

• Mesosphere

The Northen Lights that we see come from which layer?

• Troposphere

• Exosphere

• Thermosphere

• Mesosphere

The _?_ protects us from Earth's harmful UV rays.

• Ozone Layer

• Troposphere

• Clouds

• Ionosphere

Where do satellites orbit?

• Thermosphere

• Stratosphere

• Exosphere

• Mesosphere