A
What do we call the layer of air surrounding Earth?
atmosphere
What do we call the amount of water that is in the air?
humidity
What do we call the thing that forms when water vapor condenses to form a cloud near the ground?
fog
What do we call the boundary between two air masses?
a front
What do we call the weight of air pushing on the air surface?
air pressure
What do we call a large body of air?
an air mass
What do we call global winds that blow constantly from the same direction?
prevailing winds
What do we call the average of all weather conditions through all seasons over a period of time?
climate
What do we call an upward movement of warm air in the atmosphere?
an updraft
What do we call the change of liquid water to water vapor?
evaporation
True or False
The stratosphere is the lowest layer of the atmosphere and most of Earth's weather occurs here.
F
What do we call the changing of water vapor to liquid water?
condensation
True or False
A barometer is used to measure air pressure
T
True or False
Humidity is one factor that determines climate.
False
True or False
A tropical air mass forms over the oceans and has moist air.
False
True or False
Evaporation is caused from the heating of water by the sun.
True
Name the three basic cloud types.
cirrus, cumulus, stratus
Imagine that it is a gray, cloudy day, and a light rain is falling. What type of clouds would you expect to see?
stratus clouds
What do we call the air mass that forms over the oceans and has moist air?
maritime air mass
What does it mean when the barometer rises?
If the barometer is rising, the weather will probably become fair.
What do we call the winds that blow over most of the United States?
the prevailing westerlies
temperature
precipitation
wind speed
wind direction
Name the layers of the atmosphere
troposphere
stratosphere
mesosphere
thermosphere
exosphere
Two places on the earth's surface can have different temperatures and air pressure. Explain what these differences can do to the air.
These differences cause air to move from an area of higher pressure to an area of lower pressure. This movement of air is called wind.
polar
mountain
temperate
tropical
desert