Scientific Equip./Misc.
A _______ is an instrument used to measure air pressure.
barometer
A weather _______ is a prediction of future weather conditions.
forecast
A _______ occurs when a warm air mass moves over a slower cool air mass.
warm front
_______ appears when water vapor in the air condenses on the surface of objects.
dew
_______ is the distance above sea level.
altitude
A _______ is an instrument that shows the direction wind is blowing from. It shows the direction of the wind by pointing into the wind.
wind vane
When the National Weather Service issues a weather _______ it means the conditions are right for a type of severe weather.
watch
When a cool air mass pushes itself under a weaker warm air mass this type of front is called a ______.
cold front
_______ is ice that forms from water vapor in the air without passing through the liquid state.
frost
A large body of air that has about the same temperature and moisture is called an _______.
air mass
The speed of wind is measured using an _______.
anemometer
When the National Weather Service issues a weather _______ it means the severe weather has been observed.
warning
A _______ moves slowly and can take several days to leave an area resulting in several days of light rain or foggy weather.
warm front
humidity
A mixture of nitrogen, oxygen, carbon dioxide, and other gases in the atmosphere.
air
During a storm, air temperatures change rapidly. This causes strong air movements among the clouds. Teh resulting friction creates _______.
lightning
The _______ is the layer of the atmosphere that is closest to the earth.
troposphere
A _______ often brings stormy weather that may include thunderstorms and hail.
cold front
A thin blanket of gases that surround the earth.
atmosphere
Ozone is a form of _______.
oxygen
The hot air created by lightning instantly expands and then the cooler air rushes in with a crash resulting in _______.
thunder
When two unlike air masses meet, the boundary between the masses is called a _______.
front
When air masses push against each other but do not move it is called a _______.
stationary front
At any moment there are thousands of pounds of air pressing on you. The weight of this air is called _______.
air pressure
Moving air is called _______.
wind