Ch. 20 Quiz

Question 1

the mass of water vapor contained in a given volume of air

Answer 1

absolute humidity

Question 2

an instrument that measures relative humidity with two identical thermometers with a wet wick attached to the end of one thermometer

Answer 2

psychrometer

Question 3

The dew point is the temperature at which the rate of condensation ___ the rate of evaporation.

Answer 3

equals

Question 4

If the temperature stays the same and the air becomes more moist, the relative humidity will ___.

Answer 4

increase

Question 5

What must be present in order for clouds to form?

Answer 5

condensation nuclei

Question 6

the process in which the temperature of an air mass decreases as the air mass moves over a cold surface

Answer 6

advective cooling

Question 7

What does upslope fog form through?

Answer 7

lifting and cooling

Question 8

The base of the clouds marks the ___.

Answer 8

condensation level

Question 9

precipitation in the form of lumps of ice

Answer 9

hail

Question 10

What’s the diameter of a normal raindrop?

Answer 10

between 0.5- 5 mm

Question 11

What can form if rain falls through a layer of freezing air near the ground?

Answer 11

sleet

Question 12

the most common form of solid precipitation

Answer 12

snow

Question 13

the condensation that occurs when air comes into contact with grass and cools

Answer 13

dew

Question 14

results from the nightly cooling of Earth

Answer 14

radiation fog

Question 15

process where water vapor changes into a liquid

Answer 15

condensation

Question 16

cover large areas of sky and often block out the sun

Answer 16

stratus clouds

Question 17

have the highest altitude of any cloud in the sky

Answer 17

cirrus clouds

Question 18

process where fast-moving molecules escape from a liquid to form water vapor

Answer 18

evaporation

Question 19

introduces condensation nuclei into a cloud

Answer 19

cloud seeding

Question 20

the energy absorbed or released by a substance during a phase change

Answer 20

latent heat

Question 21

combines small cloud droplets into large droplets

Answer 21

coalescence

Question 22

form at low altitudes with a top that resembles cotton balls

Answer 22

cumulus clouds

Question 23

process where a solid changes directly into a gas

Answer 23

sublimation

Question 24

cools a substance without changing its state

Answer 24

supercooling

Question 25

forms along the coasts when warm, moist air moves across a cold surface

Answer 25

advection fog