Unit 5: Atmosphere Test Review

Which of the following would be the best description of the atmosphere?

• A mixture of gases in space

• Where airplanes fly

• Layers of moisture that surround the Earth

• Layers of gases that surround the Earth

The atmosphere keeps the Earth...

• Warm enough for life
• Too Cold for Life
• Spinning
• Orbiting the sun

The most common gas in the atmosphere (78%).

• Nitrogen
• Oxygen
• Carbon Dioxide
• Trace gases

As distance from Earth increases, air pressure ___________.

• decreases
• increases
• stays the same
• none of the above

What is the first layer in the atmosphere?

• Thermosphere

• Troposphere

• Mesosphere

• Exosphere

Which atmospheric layer does weather occur?

• stratosphere

• thermosphere

• troposphere

• mesosphere

Where you will find the ozone layer.

• stratosphere
• thermosphere
• exosphere
• mesosphere

What is the function of the ozone layer?

• to allow UV rays to get to Earth
• to block UV rays from getting to Earth
• To keep oxygen in
• to allow meteors to get to Earth

Which layer is above the Stratosphere?

• Ionosphere

• Thermosphere

• Troposphere

• Mesosphere

Which is true about the Mesosphere?

• Home to the northern lights

• Lowest layer of the atmosphere

• Second layer of the atmosphere

• Burns up most asteroids before they reach Earth