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50 terms

Ch 4 MET1010

A large temperature lapse rate would occur in a layer with
cold air above, warm air below
About what percent of Earth's water can be found in the oceans?
Why does a rising air parcel cool off?
It expands.
In which phase do water molecules have the lowest kinetic energy?
solid phase
Which of the following processes requires the highest RELEASE of energy from the water molecules?
When the dry and wet bulb temperatures measured by a psychrometer are equal, all but one of the following is true. Which one is false?
a rise in temperature would cause condensation
The amount of water vapor in the air (by volume) usually does not exceed:
100 %
If air at sea level with a temperature of 27 degrees C is forced up a mountain slope and the air's dew point at the condensation level is 14 degrees C, at what elevation will condensation begin?
1300 meters
The moist adiabatic rate is different from the dry adiabatic rate because:
latent heat is released inside a parcel of rising saturated air
If your environmental lapse rate is -7 C/km on a partly cloudy afternoon, then the atmosphere is said to be:
conditionally stable
If your environmental lapse rate is 17 C/km on a partly cloudy afternoon, then the atmosphere is said to be:
absolutely stable
An inversion represents an extremely stable atmosphere because a parcel of air that rises into an inversion will eventually become ________ and ________ dense than the air surrounding it.
colder, more
These two conditions, working together, will make the atmosphere the most unstable.
warm the surface and cool the air aloft
The atmosphere is most unstable when the temperature of the air ________ with height.
drops rapidly
The lapse rate of an air layer next to the ground is strongly influenced by
heating or cooling of the ground
Adiabatic processes are only important for air
which is rising or sinking
The vertical motions that occur when the air is unstable are termed
The buoyancy of a rising air parcel is greatly affected by
heat released if water vapor condenses
Natural convection and turbulence are most likely to occur when
temperature decreases rapidly with height
During the process of adiabatic cooling, the temperature decreases because the air has
lost heat to the colder air at higher altitudes.
Which of these pairs of processes, working together, will make the atmosphere most unstable?
warm the surface and cool the air aloft
A stable atmosphere is one in which
vertical motions are resisted
An increase in the lapse rate of an air layer results in the layer becoming
less stable
The temperature of rising air parcels ________ as they move upward.
The change in the free air temperature as you go up into the atmosphere is called
lapse rate
Relative humidity indicates the
nearness to saturation of the air
An instrument used to measure relative humidity is called a:
A wet-bulb thermometer and a dry-bulb thermometer are both parts of which meteorological instrument?
Which of the following requires the GREATEST RELEASE of latent heat energy into the atmosphere?
All of the following are properties that make water unique among other substances on Earth EXCEPT:
The air in Great Falls, Montana has a temperature of 5°C and a relative humidity of 50 percent. On the same afternoon, the air in Palm Springs, California has a temperature of 25°C and a relative humidity of 50 percent. What can be said about the amount of vapor in the air at these two cities?
As liquid water is evaporated into the atmosphere, heat energy is
During a clear, relatively calm day, the relative humidity will tend to ________ from sunrise to early afternoon.
Evaporation is a process which tends to keep temperatures cooler where it occurs. This is because evaporation
uses energy to change the phase of water instead of warming it
The heat released when water vapor condenses to form a cloud or when liquid droplets freeze in a cloud
helps the cloud to rise higher
Relative humidity depends on the water vapor present in the air and the
The most common reason why dew forms on the grass at night is that
temperatures are coolest in the grass
Relative humidity depends on the water vapor present in the air and the
A convergence of winds near the surface is associated with cloud production because it
forces the air to rise
When water vapor condenses, the heat involved
is released to the nearby air
Sinking or subsiding air cannot form clouds due to the
warming temperatures
If the air temperature remains constant, evaporating water into the air will ________ the dew point and ________ the relative humidity.
increase, decrease
The capacity of the air to hold water vapor
increases with an increase in temperature
As the temperature of air is reduced to its dew point, which of these is most likely to occur?
The most important process of cloud formation in the atmosphere is:
cooling by expansion of air
Which of the following will not cause air to become more unstable?
subsidence of an air column
Water vapor constitutes about this much of the atmosphere by volume.
0 to 4 percent
All of the following are liftingmechanisms in the atmosphere EXCEPT:
An air parcel rises over a mountain and cools adiabatically. Which lifting mechanism has acted on this parcel?
Which type of lifting mechanism results from warm air lifting over cold air?