WorksheetsREVIEW: The Atmosphere and Air
Total questions: 18
Worksheet time: 9mins
What is the most abundant gas in Earth's atmosphere?
Oxygen
Carbon Dioxide
Nitrogen
Argon
Air is considered a:
Pure compound.
Mixture of different gases.
Single chemical element.
Liquid that evaporates.
Which layer of the atmosphere contains the ozone layer, which absorbs harmful UV rays?
A. Troposphere
B. Stratosphere
C. Mesosphere
D. Thermosphere
As you climb a mountain (increasing altitude), what happens to air pressure?
A. It increases.
B. It decreases.
C. It stays the same.
D. It first increases, then decreases.
Gravity holds the atmosphere around the Earth primarily because:
A. Air is very cold.
B. Air has mass.
C. Air molecules are spread very far apart.
D. Air absorbs X-rays from the sun.
The force pushing on an area or surface is defined as:
Density
Altitude
Pressure
Gravity
Which layer is known as the "Weather" layer, where almost all clouds, rain, and snow occur?
Exosphere
Thermosphere
Troposphere
Mesosphere
In which atmospheric layer does the temperature get colder as you go up, due to moving away from the warm ground?
Stratosphere
Mesosphere
Thermosphere
Troposphere
Trace gases like Carbon Dioxide are important because they:
Make up most of the atmosphere.
Are essential for fire to burn.
Are very important for trapping heat.
Block harmful UV rays.
The concept of air pressure is like a human pyramid because the air at sea level supports:
The least amount of weight.
Only the air directly above it.
The weight of all the air above it.
Primarily the weight of water vapor.
The layer where meteors burn up due to friction with the air is the:
Stratosphere
Mesosphere
Thermosphere
Exosphere
In air with low density, the molecules are:
A. Squished together tightly.
B. Spread far apart.
C. Moving very slowly.
D. Found only at sea level.
The Thermosphere gets warmer as you go up mainly because:
It is close to the warm ground.
The ozone layer traps heat.
Its molecules absorb high-energy radiation directly from the sun.
Jet planes fly there.
What percentage of the atmosphere is made up of Oxygen?
~78%
~50%
~21%
~1%
18. Air pressure is highest at sea level and decreases as altitude increases because:
the weight of the air above is greatest at sea level
air molecules are more energetic at higher altitudes
gravity is weaker at sea level
temperature is always lower at sea level
Explain why a mountain climber would need an oxygen tank at the top of a very high mountain, linking your answer to the concept of density.
Because the air at high altitudes is less dense, providing less oxygen for breathing.
Because the temperature is lower at the top, making it harder to breathe.
Because the pressure is higher at the top, reducing oxygen availability.
Because the air contains more carbon dioxide at higher altitudes.
The role of gravity in keeping the atmosphere on Earth is:
It holds the atmosphere close to the planet.
It creates oxygen in the atmosphere.
It causes the atmosphere to move away from Earth.
It prevents sunlight from reaching the surface.
What happens to the density of the air as you travel from the bottom of a valley to the top of a mountain? Why?
The density of the air decreases because air pressure is lower at higher altitudes.
The density of the air increases because air pressure is higher at higher altitudes.
The density of the air remains the same because altitude does not affect air pressure.
The density of the air fluctuates randomly due to changing weather conditions.
