weather test 2

This term is used to describe clouds found in the middle height range

Alto

Thunder and lightning are associated with these clouds

cumulonimbus

a wintertime form of precipitation that consists of small ice particles is called 

ice pellets

we are likely to have our highest relative humidity

just before sunrise

under what circumstances could the relative humidity exceed 100% without producing condensation in the air

when there are no condensation nuclei

the dew point is the temperature at which 

water vapor condenses into a liquid

the rate at which the temperature changes inside a rising (or descending) parcel of saturated air is called the

Moist adiabatic lapse rate

friction causes air to speed up

false

air temperature at the ground is 27°C rises and a dew point of 14°C at the condensation level what elevation will condensation occur 

1300 meters 

stability prevails when the environmental lapse rate is

less than the wet adiabatic lapse rate

when air is unstable the environmental lapse rate is

greater than the dry adiabatic lapse rate

a parcel at 0°C at 3000 meters. If it descends what will it’s temperature be when it reaches sea level

30 degrees centigrade

an unstable air parcel is always colder then the environment

false

which of the following will not cause air to become unstable 

subsidence of an air column 

the process by which water vapor changes directly into a solid is called

deposition

the difference between the moist adiabatic lapse rate is due to 

the fact that latent heat is released by a rising parcel of saturated air 

a knowledge of stability is important because

it determines the vertical motion of the air

which cloud type would most likely form in an absolutely stable environment

stratus

conditionally unstable atmosphere is ___ with respect to unsaturated air and _____ with respect to saturated air  

unstable, stable

a heat wave can cause train tracks to bend

true

which of the following set of surface conditions would produce a convective cumulus cloud with the lowest base

air temperature 85 degrees centigrade, dew point 60 degrees centigrade

which of the following is not a mechanism for producing clouds 

air motions caused by subsidence

air outside a jet at 10km is -60°C is brought inside the jet at surface pressure (assume 0km) what is the temperature?

40 degrees

which of the following cloud types would commonly be found downwind of a mountain 

lenticular 

it can rain frogs

true

particles that serve as surfaces on which water vapor may condense are called ____ nuclei

condensation

the difference between the moist and dry adiabatic rates is due to 

the fact that latent heat is released by a rising parcel of saturated air 

during the Bergeron process of rain formation

ice crystals grow larger at the expense of the liquid cloud droplets

because snow is 90% to 95% trapped air it can act as an insulator

true

during the collision/coalesce process of rain formation 

the cloud must be a cumuliform cloud

the scottish language has 421 words relating to snow

true

a temperature profile for sleet is

below freezing layer, shallow melting layer, deep freezing layer

upper level winds are slower in winter than in summer

false

clouds ____ and ____ as a warm front approach

thicken; get lower

a temperature profile for freezing rain is

below freezing layer, deep melting layer, shallow freezing layer

convergence can be caused by 

speed change and/or movement toward a point 

if you see cirrus clouds, followed by a later cirrostratus, and then altostratus, then a _____ is approaching

warm front

a wintertime form of precipitation that consists of small ice particles is called _____

sleet

this term is used to describe clouds that produce precipitation 

nimbo 

a blizzard occurs only when visibility is under 200 meters and winds are higher than 48 km/h

true

ice is less dense than water

true