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WorksheetsDew Point and Relative Humidity
Total questions: 23
Worksheet time: 20mins
Name
Class
Date
1.
The phase change from water vapor to liquid water is known as:
a)
evaporation
b)
precipitation
c)
condensation
d)
sublimation
2.
Dew Point is the
a)
temperature air cools down to reach condensation (or turn into a liquid)
b)
temperature where ice melts to liquid water
c)
temperature where ice turns directly into water vapor
d)
time of day when dew on the ground disappears
3.
If the air is "saturated", that means:
a)
the air is full of water
b)
the air is partially full of water
c)
it's amount of water vapor in the atmosphere right now
d)
how much liquid water it potentially can hold
4.
Dew is most likely to form
a)
after heavy rain on a humid day
b)
when humid air contacts cold ground
c)
when the snow on the ground melts
d)
during windy nights when it rains
5.
Water vapor is one of the components of the air in the atmosphere. What change causes the vapor in the air to form clouds?
a)
A. As air rises in the atmosphere, it becomes warmer and cannot hold as much water.
b)
B. As air cools, water vapor in the air condenses to liquid or solid state.
c)
C. Air rises, the water becomes heavier and changes form.
6.
Where can you find water vapor in the air?
a)
only in clouds
b)
only as rain
c)
everywhere
7.
Water molecules suspended in air can be described as _?_.
a)
liquid
b)
gas
c)
solid
8.
The name for the process in which water vapor changes back into a liquid is
a)
Evaporation
b)
Condensation
c)
Sublimation
d)
Deposition
9.
As the air temperature increases, the air's capacity for water vapor:
a)
increases
b)
decreases
c)
remains the same
d)
is unrelated to air temperature and can either increase or decrease
10.
The time of day when the relative humidity reaches a maximum value is usually
a)
at the time when the air temperature is highest
b)
in the middle of the afternoon
c)
at the time when the air temperature is lowest
d)
just before sunrise
11.
The temperature to which air must be cooled in order to become saturated is the:
a)
Relative Humidity
b)
Mixing Ratio
c)
Dew Point Temperature
d)
Wet-bulb Temperature
12.
What is the Dew Point Temperature if the dry-bulb temperature on your sling psychrometer is 20ºC and the wet-bulb temperature is 15ºC?
a)
14ºC
b)
12ºC
c)
10ºC
d)
-18ºC
13.
What do we call a collection of millions of tiny water droplets or ice crystals?
a)
Fog
b)
Humidity
c)
Clouds
d)
Weather
14.
The sun heats up surface water, causing evaporation (turning a liquid into a gas). The water vapor then rises into the air creating....
a)
rain
b)
pollution
c)
fog
d)
humidity
15.
Water droplets that condense from the air onto cool surfaces near the ground are called....
a)
fog
b)
precipitation
c)
dew
d)
icicles
16.
What is relative humidity?
a)
humidity that is related to other humidity
b)
condensation
c)
clouds
d)
the amount of water in the air compared to the amount of water the air can hold - a ratio
17.
The actual amount of water vapor in the air is called
a)
air pressure
b)
humidity
c)
relative humidity
d)
dew point
18.
If the air is only holding one-third as much moisture as it can possibly hold, what is the relative humidity?
a)
50%
b)
25%
c)
33%
d)
67%
19.
What will happen if the relative humidity is 100%, and the temperature begins falling?
a)
The air will be sticky and uncomfortable
b)
Dew will form
c)
The temperature will rise
d)
The atmospheric pressure will fall
20.
Winds are caused by differences in
a)
precipitation
b)
humidity
c)
air pressure
d)
turbulance
21.
Which environment will probably have the lowest relative humidity?
a)
swamp
b)
desert
c)
rain forest
22.
Which type of air has a relative humidity of 100%?
a)
space
b)
hot
c)
dry
d)
saturated
23.
The temperature at which air is saturated with water vapor and condensation occurs is called
a)
humidity
b)
air pressure
c)
dew point
d)
relative humidity
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