1.5-1.6

Which gas in our atmosphere is most abundant?

• Argon
• Oxygen
• Nitrogen
• Carbon Dioxide

Temperature in the stratosphere warms as altitude increases.

• True
• False

What is the percentage of oxygen in Earth's atmosphere?

• 1%
• 21%
• 78%
• 90%

In which layer of the atmosphere does weather occur?

• Mesosphere
• Thermosphere
• Stratosphere
• Troposphere

What causes the temperature to increase in the stratosphere?

• Nitrogen
• Ozone
• Water Vapor
• carbon dioxide

What decreases as you go up in the atmosphere?

• Altitude
• Atmosphere
• Meteors
• Air Pressure

The layers of the atmosphere are classified according to changes in _________.

• altitude
• density
• composition
• temperature

Which of the following is NOT a reason why the atmosphere is important?

• It is made of many layers.
• It provides gases living things need.
• It provides warm temperatures.
• It protects us from UV rays and meteors.

Which of the following is the correct order of the atmosphere layers from Earth to space?

• troposphere, stratosphere, mesosphere, thermosphere, exosphere
• troposphere, mesosphere, thermosphere, exosphere, stratosphere
• thermosphere, stratosphere, mesosphere, troposphere, exosphere
• troposphere, stratosphere, mesosphere, exosphere, thermosphere

Describe how the ozone layer protects the earth.

• Absorbs solar radiation, Protects Earth from UV Rays,  and emits heat
• Ozone in the lower atmosphere is a pollutant