AnswersSS4 PGCPS EARTH SPACE OC SUMMER 2027 - 794243Structure and Composition of the Atmosphere

Structure and Composition of the Atmosphere Answers

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Joe, a hiker, stands at the top of a hill on a trail above the ocean. Joe's friend Dave is just starting out at the trailhead, which is at the beach.Which statement about this scenario is accurate?

A
The air Joe is breathing is denser than the air at sea level.
B
The air pressure is higher where Joe is than where Dave is.
C
If Joe keeps going up, air pressure will continue to decrease.
D
The air Joe is breathing is denser than the air Dave is breathing.
3

Which correctly lists three characteristics that are used to describe air?

A
altitude, density, radiation
B
density, radiation, mass
C
mass, pressure, density
D
pressure, altitude, radiation
4

Which phrase describes air density?

A
increases as altitude increases
B
equals mass divided by volume
C
pushes molecules in one direction
D
exerts less pressure as it increases
6

As altitude increases, what happens to air pressure?

A
It fluctuates.
B
It increases.
C
It decreases.
D
It stays the same.
7

Which gas is most abundant in Earth’s atmosphere?

A
oxygen
B
nitrogen
C
water vapor
D
carbon dioxide
8

Which gas in Earth’s atmosphere forms ozone?

A
oxygen
B
nitrogen
C
water vapor
D
carbon dioxide

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