End of the Unit Review

What does it mean if the air is at 100% relative humidity?

• The air is only made out of water vapor.

• The air is holding all of the water vapor that it can at that particular temperature.

• The air has some water vapor in it.

• The air is very warm.

What is an air mass?

• a large body of air with similar temperature and pressure throughout

• a large body of air that can move

• a large body of air with the same amount of pressure

• a large body of air with similar temperature and humidity throughout

How much water would condense out of the air if the temperature dropped from 100°F to 90°F?

• about 12 g/cm³

• about 20 g/cm³

• about 9 g/cm³

How much would the air have to cool if it is at 50% relative humidity and 80°F to achieve 100% relative humidity?

• 10°F

• 15°F

• 20°F

• 25°F

If the air pressure outside is increasing (high pressure), the air is ____________.

• rising

• sinking

• moving to the east

• moving to the west

Precipitation often occurs at a front because

• warm air pushes cold, dry air up higher where it cools down more and causes the water vapor to condense and form a cloud.

• cold air pushes warm, moist air up higher where it cools down and causes the water vapor to condense and form a cloud.

• warm and cold air mix to create clouds.

What causes the air on our planet to move in a predictable way to form our prevailing winds. Check all that apply.

• the rotation of the Earth

• the moon's gravitational pull

• volcanic eruptions

• the uneven heating of the Earth that causes air to rise and sink in convection currents

What characteristics would air mass #1 have?

• cold and humid

• warm and humid

• warm and dry

What characteristics would air mass #2 have?

• cold and humid

• cold and dry

Use the map to answer the question. Why are there often large storms that occur in the middle and eastern part of the United States?

• The land is flat in the east so the air masses start to move so fast they create a storm.

• Small storms from the north mix with small storms from the south to create even bigger storms.