Which condition below could make a layer of air more unstable? Cool the lower pa

Question

Which condition below could make a layer of air more unstable?

Cool the lower part of the layer.

Warm the upper part of the layer.

Cool the upper part of the layer.

all of the above.

2 points   

QUESTION 12

The dry adiabatic rate is the rate at which

an air parcel rises.

temperature changes in a rising or descending parcel of unsaturated air.

volume changes when a parcel expands or is compressed.

latent heat energy is released in a rising air parcel.

2 points   

QUESTION 13

The unit of pressure most commonly found on a surface weather map is

inches of mercury.

millibars.

pounds per square inch.

atmospheres.

2 points   

QUESTION 14

The process in which falling ice crystals are colliding with supercooled water droplets which stick and freeze. This process is called

nucleation.

agglomeration.

accretion.

deposition.

2 points   

QUESTION 15

If an air parcel is given a small push upward and it continues to move upward on its own accord, the atmosphere is said to be

unstable.

stable.

anti-buoyant.

dynamic.

2 points   

QUESTION 16

Which cloud type below will only produce precipitation by the collision-coalescence process?

a thick, cold nimbostratus cloud

a thick, warm cumulus cloud

a thick, cold cumulus cloud

a supercooled cumulus congestus cloud

2 points   

QUESTION 17

Chinook winds are

warm, dry, downslope winds.

warm, moist, downslope winds.

cold, dry, downslope winds.

warm, dry, upslope winds.

2 points   

QUESTION 18

In a conditionally unstable atmosphere, the environmental lapse rate will be       than the moist adiabatic rate and       than the dry adiabatic rate.

greater, less

greater, greater

less, greater

less, less

2 points   

QUESTION 19

If pressure gradient force is the only force acting on an air parcel, which way would the air parcel be blowing towards?

low pressure

high pressure

parallel to the isobars

none of the above

2 points   

QUESTION 20

The       is an apparent force created by the earth's rotation.

Pressure Gradient Force

Coriolis force

Centripetal Force

Gravitational Force

2 points   

QUESTION 21

If the earth's gravitational force were to increase, atmospheric pressure at the ground would

increase.

decrease.

remain the same.

cause the atmosphere to expand vertically.

2 points   

QUESTION 22

The Intertropical Convergence Zone (ITCZ) is a region where

the polar front meets the subtropical high.

northeast trades meet the southeast trades.

northeast trades converge with the subtropical high.

the Ferrell cell converges with the Hadley cell.

2 points   

QUESTION 23

A wind blowing at a constant speed parallel to straight isobars with the pressure gradient force (PGF) and the Coriolis force in balance is called a

geostrophic wind.

meridional wind.

gradient wind.

zonal wind.

2 points   

QUESTION 24

During the ice crystal process of rain formation

only ice crystals need be present in a cloud.

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

the temperature in the cloud must be -40o C (-40o F) or below.

the cloud must be a cumuliform cloud.

2 points   

QUESTION 25

In the three-cell model of the general circulation, areas of surface low pressure should be found at

the equator and the poles.

the equator and 30o latitude

the equator and 60o latitude.

30o latitude and 60o latitude.

2 points   

QUESTION 26

An offshore wind

blows from land to water.

blows from water to land.

blows only at night.

only blows during the day.

2 points   

QUESTION 27

Surface winds blow across the isobars at an angle due to

the Coriolis force.

the pressure gradient force.

the frictional force.

the centripetal force.

2 points   

QUESTION 28

The average winds aloft are strongest in

summer.

winter.

fall.

spring.

2 points   

QUESTION 29

Which of the following is a polar front jet stream characteristic?

blows directly from east to west.

is located around 700 mb.

is much weaker than the subtropical jet stream.

has a tendency to be more meridional than zonal along the mean flow.

2 points   

QUESTION 30

The wind around a surface low, pressure center in the Southern Hemisphere blows

counterclockwise and outward from the center.

counterclockwise and inward toward the center.

clockwise and outward from the center.

clockwise and inward toward the center.

2 points   

QUESTION 31

During the summer in humid climates, nighttime clouds tend to form over water during a

land breeze

chinook wind.

Gulf Stream

Santa Ana wind.

2 points   

QUESTION 32

Which below is not an assumption of the single-cell model of the general circulation of the atmosphere?

The earth's surface is covered with water.

The earth rotates once in 24 hours

The sun is always overhead at the equator.

none of the above.

2 points   

QUESTION 33

Net convergence of air column would cause surface pressure to ____ and net divergence would cause surface pressure to ____.

increase, decrease

increase, increase

decrease, decrease

decrease, increase

2 points   

QUESTION 34

Large raindrops fall ____ than smaller raindrops, and have a ____ terminal velocity than small raindrops.

faster, lesser

faster, greater

slower, lesser

slower, greater

2 points   

QUESTION 35

A sea breeze circulation is caused by       differences.

humidity

temperature

altitude

surface roughness

2 points   

QUESTION 36

Lines connecting points of equal pressure are called

isobars.

millibars.

contours.

isotherms.

2 points   

QUESTION 37

Hail is associated with what cloud?

stratus

cumulus

stratocumulus

cumulonimbus

2 points   

QUESTION 38

The merging of liquid cloud droplets by collision is called

coalescence.

riming.

accretion.

condensation.

2 points   

QUESTION 39

The large thermally driven convection cell that is driven by convective "hot" towers along the equator is the

Ferrell cell.

Pacific High.

El Nino-Southern Oscillation.

Hadley cell.

2 points   

QUESTION 40

The Walker circulation is associated with the following atmospheric phenomena.

Ferrell cell

Pacific High

El Nino-Southern Oscillation

Hadley cell

2 points   

QUESTION 41

Conditional instability depends on the condition of wind.

True

False

2 points   

QUESTION 42

A rising parcel of moist air cools at a rate of 10°C per 1000 m.

True

False

2 points   

QUESTION 43

The El Niño is an example of a global wind circulation system.

True

False

2 points   

QUESTION 44

The Coriolis force causes air parcels to rise in the atmosphere.

True

False

2 points   

QUESTION 45

The Gulf Stream current brings warm, ocean water across the north Atlantic.

True

False

2 points   

QUESTION 46

In the summer at middle latitudes, the collision-coalescence process is the dominant precipitation-producing process.

True

False

2 points   

QUESTION 47

The Bermuda high is at its strongest during the summer months.

True

False

2 points   

QUESTION 48

Liquid water content has the biggest impact on the warm cloud precipitation process.

True

False

2 points   

QUESTION 49

Small cumulus clouds forming above a mountain in the early afternoon could indicate a chinook wind event.

True

False

2 points   

QUESTION 50

The surface pressure pattern in the 3-cell model largely determines the direction of global surface winds but has very little effect on the global distribution of precipitation.

True

False

Cool the lower part of the layer.

Warm the upper part of the layer.

Cool the upper part of the layer.

all of the above.

Explanation / Answer

11) all of the above

12) temperature changes in a rising or descending parcel of unsaturated air

13) millibars

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.