dew point, relative humidity and clouds
if air is holding all of the water vapor it can hold at a particular temperature , the relative humidity is _______%
100
if 1kg of air can hold a maximum of 10g and is now holding 2g of water, the relative humidity of the air is _______%
20
when moisture condenses on small particles in the atmosphere, __________ may form
a cloud
how does a cloud form?
a cloud forms when the temperature outside gets cool enough to reach its dew point (the temperature at which water condenses). The relative humidity exceeds 100% because of the cool temperature. This is due to the fact that cold air is less dense allowing less space for moisture, making the air more full. If the relative humidity exceeds 100%, it causes water vapor in the air to condense into liquid water onto dust particals in the air forming a cloud.
on a psychrometer, if there is a small difference between the wet and dry bulb temperatures , __________ of water evaporated so the relative humidity is _________
a little and high
circle the letter of each sentence that is true about relative humidity a. it is a percentage b. it is all the water vapor the air can hold c. it depends on the temperature d. it measures how hot it feels
a. it is a percentage c. it depends on the temperature
circle the letter of each sentence that is true about cloud types a cumulous clouds are usually a sign that a storm is approaching b. cumulonimbus and nimbostratus clouds produce rain or snow c. altostratus clouds are lower than regular stratus clouds d. cirrus clouds are made up of ice crystals
b. cumulonimbus and nimbostratus clouds produce rain or snow d. cirrus clouds are made up of ice crystals
circle the letter of each sentence that is true about condensation of water vapor a. it occurs when air gets warm b. it can occur on cold surfaces c. it explains why colds form d. it can form on dust particles
b. it can occur on cold surfaces c. it explains why colds form d. it can form on dust particles
if the amount of moisture stays the same and the temperature increases , the relative humidity ___________
decreases
the temperature at which water vapor condenses is called the __________
dew point
if the dry bulb temperature were lower, would the relative humidity be higher or lower in the room __________
higher
a cirrus cloud is made of __________
ice crystals
when the amount of moisture stays the same, if the temperature decreases the relative humidity _________
increases
a stratus cloud is a __________ level cloud
low
if there is a large difference between the wet bulb and the dry bulb temperatures, the relative humidity is ____________
low
on a humid day the clouds will be _________ in the sky
lower
warm air can hold __________ moisture the cold air
more
cumulus clouds
piles of puffy clouds associated with fair weather
condensation
process by which molecules of water vapor become liquid water
relative humidity can be measured with a ________________
psychrometer
what is relative humidity
relative humidity is the precentage of water vapor in the air compared to the maximum amount of water vapor the air can hold at a particular temperature
stratus clouds
smooth sheets or layers associated with percipitation not hail
cumulonimbus clouds
tall, dark and billowing associated with thunderstorms
evaporation
the process by which water molecules in liquid water escape into the air as water vapor
dew point
the temperature by which condensation begins
explain how the temperature of the wet bulb thermometer decreases
the temperature of the wet bulb thermometer decreases because as the water from the wet bulb evaporates (turns into water vapor) it uses the thermometers heat causing the wet bulb temperature to decrease because it has less heat than it originally has
cirrus clouds
thin wispy clouds made up of ice crystals associated with fair weather
the weather associated with a cumbulonimbus cloud is _____________
thunderstorms
is the following sentence true or false? clouds form when water vapor in the air condenses to form liquid water or ice crystals
true
which can hold more moisture warm are or cold air? why?
warm air can hold more moisture because the molecules are more spread out in warm air allowing more space for moisture