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REVIEW: Gravity, Air Pressure, and Altitude

Total questions: 17

Worksheet time: 11mins

Name
Class
Date
1.
Why doesn't the atmosphere float away into space?
a)
Because the sun's heat keeps it attached to Earth
b)
Because air molecules are sticky and cling together
c)

Because gravity pulls gas molecules toward Earth's surface

d)
Because the air is too heavy to move
2.
In a human pyramid, why do the people at the bottom support the most weight?
a)
The pyramid is upside down
b)
They have all the people above them pressing down on them
c)
They volunteered to be at the bottom
d)
They are stronger than people at the top
3.
How is air pressure similar to a human pyramid?
a)
Air pressure has nothing to do with pyramids
b)

The air at sea level supports the weight of all the air above it

c)
Both involve people standing on each other
d)
Both are used in circus performances
4.
What happens to air pressure as you climb a mountain and altitude increases?
a)
Air pressure increases because the air gets thinner
b)
Air pressure decreases because there is less air stacked above you pushing down
c)
Air pressure stays the same no matter how high you go
d)
Air pressure increases because you are closer to the sun
5.
What does density mean when describing air?
a)
How hot the air is
b)
How many air molecules are packed into a given space
c)
How wet the air feels
d)
How fast the air is moving
6.
Where is the air density the highest?
a)

At sea level

b)
At the top of mountains
c)
In the clouds
d)
In outer space
7.
Why does air become 'thinner' as you go higher in altitude?
a)
The air expands and spreads out
b)
Temperature always decreases with altitude
c)
Gravity pulls most gas molecules toward Earth's surface, so fewer molecules exist at higher altitudes
d)
The sun burns away the air molecules
8.
If you compare sea level to the top of a mountain, which location has higher air pressure and why?
a)
Both have equal pressure
b)
Air pressure is not affected by altitude
c)
The mountain top has higher pressure because it is closer to space
d)
Sea level has higher pressure because there is more air stacked above pushing down
9.
What is the relationship between gravity and the atmosphere?
a)
Gravity has no effect on the atmosphere
b)
Gravity pushes the atmosphere away from Earth
c)

Gravity pulls gas molecules downward not allowing the atmosphere to float away

d)
Gravity only affects solid objects, not gases
10.
As altitude increases, what happens to both air pressure AND density?
a)
They are not related to each other
b)
Both increase together
c)
Both decrease together
d)
Pressure increases while density decreases
11.

How does air pressure change as you move up a mountain? Label the appropriate air pressures.

a)

High pressure

b)

Low pressure

c)

Warm Pressure

d)

Cold Pressure

1
2
1)
2)
12.

What happens to air pressure as altitude increases?

a)

air pressure is greatest

b)

air pressure is the least

1
2
1)
2)
13.

Which gas makes up the largest percentage of Earth's atmosphere?

a)

Argon

b)

Oxygen

c)

Nitrogen

d)

Carbon dioxide

14.

Which of the following is considered a trace gas in Earth's atmosphere? (pick all that apply)

a)

Nitrogen

b)

Oxygen

c)

Argon

d)

Carbon dioxide

15.

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

a)

78%

b)

21%

c)

1%

d)

0.04%

16.

What is the approximate percentage of nitrogen in Earth's atmosphere?

a)

78%

b)

21%

c)

1%

d)

0.04%

17.

Why are trace gases important in the atmosphere even though they are present in very small amounts?

a)

They play key roles in processes like the greenhouse effect and ozone formation

b)

They help maintain air pressure

c)

They have no effect on Earth's systems

d)

They make up most of the air we breathe

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