Minor Summative | Earth's Atmosphere

Why is Earth's atmosphere important?

• It is beautiful.
• It prevents pollution from happening.
• Life on Mars could not exist without it.
• Life on Earth could not exist without it.

What two gases make up the majority of air?

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

Nitrogen makes up what percent of our atmosphere?

• 21%
• 1%
• 87%
• 78%

What percentage of our atmosphere is made up of trace gases such as argon, water vapor, and carbon dioxide?

• 1%

• 21%

• 78%

• 90%

Atmospheric greenhouse gases help regulate Earth's climate by

• increasing the amount of solar radiation reaching Earth.

• storing energy produced by human activity.

• absorbing infrared radiation reflected or released by Earth.

• increasing the average density of air.

As distance from Earth increases, what happens to air pressure?

• Air pressure decreases.
• Air pressure increases.
• Air pressure stays the same.
• None of the above

What is the correct order of earth's atmospheric layers from bottom to top?

• Stratosphere, Mesosphere, Troposphere, Thermosphere, Exosphere.
• Stratosphere, Troposphere, Mesosphere, Thermosphere, Exosphere.
• Stratosphere, Troposphere, Thermosphere, Mesosphere, Exosphere.
• Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere.

In which layer of the atmosphere does MOST of Earth’s weather occur (take place)?

• the exosphere, which is the outermost layer

• the troposphere, which is the lowest layer

• the thermosphere, which has the highest temperature

• the stratosphere, which contains a sub-layer of ozone

Within the stratosphere is the ozone layer. What does the ozone layer do?

• It protects us from meteors
• It protects us from violent solar flares
• It protects us from ultra violet radiation
• It helps us breathe
  

Which layer protects the earth from meteors?

• Troposphere
• Stratosphere
• Mesosphere
• Thermosphere