CH 18 Review Water in the Atmosphere

If the specific humidity is 5 g/kg and the water vapor capacity is 10 g/kg, the relative humidity is… –A. 25% –B. 50% –C. 5% –D. 10%

–B. 50%

Water droplets in fog are ______ to move with slight movements of air –A. difficult –B. easy –C. impossible

–B. easy

When the air is saturated it has _______% relative humidity?

100%

Dew point is the __________ at which condensation begins –A. air pressure –B. relative humidity –C. specific humidity –D. temperature

The moist-adiabatic lapse (cooling) rate is __________ than the dry-adiabatic lapse (cooling) rate. –A. greater (faster) –B. less (slower) –C. the same

–B. less (slower)

The air temperature at different elevations, the cooling rate of rising air, and the dew point help meteorologist predict where clouds will form. This altitude (height) is known as the ___________ level.

condensation

Condensation occurs when the air temperature drops to or below the ______

Dew point temperature

Precipitation is ________________________ ________________________ ________________________

Water (in any state) falling from cloud

The smoke from the match in our cloud lab, gave us ___________, on which the water could form around.

Condensation nuclei

Clouds can form in all layers of the ____________.

troposphere

Air that is moist, rising, and cooling will be found on the _______________ side of a mountain.

windward

The actual amount of water vapor in the air is the –A. relative vapor content –B. relative humidity –C. specific (absolute) humidity

At -30 degrees Celsius clouds are formed mostly of –A. ice crystals –B. supercooled water –C. snow –D. Both A and B –E. Both A and C –F. Both B and C

–E. Both A and C

Cumulus clouds need a continuous supply of _____________ to grow. –A. Warm, dry air –B. Cool, dry air –C. Cool, moist air –D. Warm, moist air

When warm, moist air blows over a cold surface, ________ can form.

fog

Rain, sleet, hail, snow, and drizzle are forms of ___________

precipitation

Rain shadow deserts are found on the ____________ side of a mountain.

leeward

The dry-adiabatic lapse rate (for unsaturated air) is about ______ degrees Celsius per kilometer.

10

Air temperature does not affect ________ humidity –A. relative –B. specific (absolute)

A cooling rate of 5-9 degrees Celsius represents the ___________-adiabatic lapse rate –A. Dry –B. Wet

When the air is saturated, the wet- and dry-bulb temperatures on a sling psychrometer will be _____________.

The same

As air cools, it’s ability to hold water (water vapor capacity) –A. increases –B. decreases –C. remains the same

–B. decreases

In evaporation water changes phase (state) from _________ to ___________

Liquid to gas (vapor)

In condensation, water changes phase from ___________ to ___________

Gas (vapor) to liquid

The first thing that happens to water (vapor) in the air when the dew point is reached is it __________

condenses

As warms, it’s ability to hold water (water vapor capacity) –A. increases –B. decreases –C. remains the same

–A. increases