ch 7

Question 1

The activation temperature of most ice-forming nuclei is ______ 0 °C.

Answer 1

Well below

Question 2

Hygroscopic nuclei ______ water molecules.

Answer 2

attract

Question 3

The relative humidity within a cloud is ______ 100 percent.

Answer 3

about

Question 4

Who is luke howard

Answer 4

The British naturalist who is credited with being among the first to devise a classification of cloud types

Question 5

cloud types, which one is coldest

Answer 5

cirrus

Question 6

cloud types, which one is warmest?

Answer 6

stratus

Question 7

Extreme nocturnal radiational cooling occurs when

Answer 7

skies are clear

Question 8

A cloud that forms when warm air overrides cold air is

Answer 8

cirrostratus

Question 9

This cloud does not typically have relatively low bases with the exception

Answer 9

cirrus

Question 10

Cirrcus clouds are typically composed of

Answer 10

ice crystals only

Question 11

usually only drizzle falls from which cloud

Answer 11

stratus clouds

Question 12

Clouds at temperatures between 0 °C and -9 °C are typically composed of

Answer 12

mostly supercooled water droplets.

Question 13

A _____ cloud develops as a consequence of local convection

Answer 13

cumulus

Question 14

The convective condensation level (CCL) closely corresponds in altitude to the base of a ______ cloud.

Answer 14

cumuliform

Question 15

Which one of the following cloud types would most likely be responsible for producing heavy rain?

Answer 15

cumulonimbus

Question 16

A cloud that exhibits considerable vertical development is

Answer 16

cumulonimbus.

Question 17

a cloud that may be cold at the top and warm at low levels

Answer 17

cumulonimbus

Question 18

Cumulonimbus (thunderstorm) clouds typically are

Answer 18

cold at high altitudes and warm at cloud base.

Question 19

Disk shaped, mountain-wave clouds are known as

Answer 19

altocumulus lenticularis.

Question 20

A rarely seen cloud that forms in the upper mesosphere and may be composed of ice deposited on meteoric dust

Answer 20

noctilucent

Question 21

all of the following clouds may be formed by waves propagating horizontally within the atmosphere with the exception of

Answer 21

stratus

Question 22

To be considered fog, visibility must be restricted to ______or less. Otherwise, the suspension is called mist.

Answer 22

1000m

Question 23

in dense fog the mixing ratio is …… the saturation mixing ratio

Answer 23

about equal too

Question 24

Persistent radiation fog is likely to develop on a

Answer 24

river valley bottom.

Question 25

advection for forms when

Answer 25

warm humid air streams over the cold surface of a lake.

Question 26

Fog formed when cold dry air streams over the surface of a relatively warm body of water is known as

Answer 26

steam fog

Question 27

At the same pressure, cold air is ______ warm air and ______

Answer 27

more dense than ….flows downslope

Question 28

The type of fog formed in spring when mild humid air flows over an old snow cover is

Answer 28

advection fog

Question 29

0 out of 1 points

At saturation and at the same temperature, the vapor pressure is greater over ______ than over ______

Answer 29

water …ice

Question 30

Which one of the following has the greatest terminal velocity?

Answer 30

large hailstorm

Question 31

for a given particle the terminal velocity is ….. in air than in water

Answer 31

greater

Question 32

Most precipitation that falls in middle latitudes originates in ______ clouds.

Answer 32

nimbostratus or cumulonimbus

Question 33

Most precipitation that falls in middle latitudes originates in ______ clouds.

Answer 33

cold

Question 34

It takes the water content of about ______ cloud droplets to form a single raindrop.

Answer 34

1 000 000

Question 35

A warm cloud is composed of

Answer 35

virga

Question 36

The Bergeron-Findeisen precipitation process takes place within ______ clouds.

Answer 36

cold

Question 37

In cold clouds, a vapor pressure that is ______ for water droplets is ______ for ice crystals.

Answer 37

saturated ….super saturated

Question 38

The type of frozen precipitation sometimes produced by a summer thunderstorm is

Answer 38

hail

Question 39

Rain that has a pH ______ 5.6 is considered to be acid rain.

Answer 39

lower than

Question 40

weather radar continually emits pulses of

Answer 40

microwaves

Question 41

Weather radar gathers information about precipitation in clouds by measuring the

Answer 41

amount of energy scattered back to the transmitter

Question 42

Operating in the Doppler mode, weather radar detects particles moving __________ the radar beam.

Answer 42

directly toward or away from

Question 43

______ uses multiple beams sent out simultaneously, providing a faster, more detailed picture of the atmosphere.

Answer 43

Phased array weather radar

Question 44

Which type of rain gauge performs better at subfreezing air temperatures?

Answer 44

weighting bucket rain gauge