Unit 4 test (Lesson 1-2) Flashcards
What is used to measure air pressure?
Barometer
Wht is weather?
The condition of earth’s atmosphere at a certain time and place.
What is used to measure wind speed?
Anemometer
What is temperature?
Is a measure of how hot or cold something is.
What is dew point?
Is the temperature at which more condensation than evaporation occurs.
What does a wind vane measure?
Wind direction
What does a hygrometer measure?
Humidity
What is humidity?
The amount of water vapor in the air.
What measures relative humidity?
Psychrometer
What is precipitation?
Is any form of water that falls to earth from clouds.
What do you use to measure snow?
A ruler/measuring stick
What are 4 forms of precipitation?
Hail, sleet, snow, and rain
What is air pressure?
Is the force of air molecules pushing on an area.
What is visibility?
How far we can see.
What moves horizontally towards the ground?
Wind
What are 5 ways to collect weather data?
Ground station, weather buoy, an airplane, a satellite, and ships.
What can cause poor visibility?
Pollution or fog.
What 2 things decrease with altitude?
Air pressure and density.
How much of the sun’s energy reaches earth and is reflected back into space?
25% of the sun’s energy is reflected back into space by clouds.
How do clouds form?
For clouds to form, 2 things have to happen: air has to be cooled to it’s dew point, and there must be a solid surface so water molecules can condense. They for when water vapor condenses, or changes from a gas to a liquid.
How much of the sun’s energy is absorbed by land?
50%
What does solar energy do for the water cycle?
It drives the water cycle, which provides energy for cloud formation.
What is frontal lifting?
Can occur when a warm air mass rises over a cold air mass. Once the rising air cools to it’s dew point, condensation occurs and clouds form.
What is orographic lifting?
Occurs when something forces a mass of air upward. Then after that, clouds form.
What are stratus clouds? What does “stratus” mean in Latin?
They are thin and flat. Stratus means: “layer.”
What are cumulus clouds? What does the word “cumulus” mean in Latin?
They are thick and puffy. Cumulus means: “heap.”
What are cirrus clouds? What does the word “cirrus” mean in Latin?
They look feathery, and they have curls at the end. They are fully white. Cirrus means: “curl.”
What are the types of low clouds? What does “nimbus” mean in Latin?
Startus, stratocumulus, and nimbostratus. Nimbus means: “rain.”
What are the types of middle clouds? What does the prefix “alto” mean in Latin?
Altocumulus and altostratus. Alto: it is used to name middle clouds.
What are the types of high clouds? What does the prefix “cirro” mean?
Cirrus, cirrocumulus, and cirrostratus. Cirro : is used to name high clouds.
