Test Your Knowledge About the Unit 6 Chapter

What is your name?

1. When water vapor enters Earth's atmosphere(troposphere), what happens to the water vapor?

sinks because it is more dense than air(78% nitrogen, 21% oxygen)

floats because it is less dense than air(78% nitrogen, 21% oxygen)

hydrogen and oxygen atoms separate into separate gases

decreases the relative humidity

2. A barometer measures atmospheric pressure. Atmospheric air pressure is the result of an air mass above a given point on the surface of the Earth. A low pressure air mass is less dense than a high pressure air mass because of the abundant amount of water vapor in the low pressure air, as well as the warm temperature of the air mass. The weight of the water vapor (hydrogen&oxygen) is less dense than air which is composed of 78% nitrogen and 21% oxygen. Which statement explains why water vapor floats in our troposphere layer of Earth's atmosphere. (Note: Atomic weights: H=1, O=16, N=14)

(2H+O) is greater than (2N) or (2O)

(2H+O) is less than (2N) or (2O)

(2H+O) is equal to (2N) or (2O)

(2H+O) plus (2N) is equal to 2H+S+4O

3. A student uses a stationary sling pyschrometer and observes that the dry bulb and wet bulb temperatures are the same. What inference can be drawn from the laboratory analysis?

relative humidity is 0%

relative humidity is 100%

due point temperature is 100 degrees Celsius

due point temperature is 0 degrees Celsius

4. In North America, what direction does the air in a high pressure system move?

clockwise and inward

clockwise and outward

counterclockwise and inward

counteclockwise and outward

5. Due to the low specific heat of soil on land, during the daytime, land heats up faster than water. This warm air rises and cool air from the ocean replaces the warm rising air on land. Since wind direction is always labeled from the direction from where it originates, we call this a sea breeze. During the night time what happens to the air on land? (note: wind always blows from areas of high pressure to areas of low pressure)

air volume expands

air density decreases

due to the low specific heat of the soil on land, air cools, contracts in volume, density increases, and air pressure increases.

air blows from the ocean towards the land