Unit 1 Review - Weather Flashcards
Name the four types of precipitation
Rain
Snow
Sleet
Hail
How does sleet form?
Raindrops freeze on their way down to the ground
How does hail form?
Winds move frozen water drops up and down inside clouds, forming layers of ice that eventually to the ground.
How does rain form?
Tiny water droplets collide and form larger drops that fall to the ground
How does snow form?
Water vapor freezes into crystals
What are the 4 types of clouds?
Cumulus : fluffy cotton clouds
Cumulonimbus: mushroom shaped clouds
Cirrus: feathery clouds
Stratus: dark clouds
What is humidity?
The amount of water vaper in the air
Do air masses meet at places of high humidity or at fronts?
at fronts
Where do most changes in weather occur?
Along fronts
Describe what happens at a cold front when a cold air mass catches up with and meets a warm air mass
At a cold front, cold air pushes under warm air. As the warm air rises, water vapor condenses to form clouds. Cold fronts move quickly, causing strong winds and heavy rains. Thunderstorms often occur along cold fronts. As the cold front passes, the sky clears and the weather gets cooler.
Describe what happens at a warm front when a warm air mass catches up with and meets a cold air mass?
At a warm front, a big collection of warm, moist air creeps up over cold air. Warm fronts move slowly, and as they approach they bring light winds and high, wispy cirrus clouds. The next clouds to arrive are usually thick stratus clouds closer to the ground, which brings rain or snow. Eventually, the sky clears and the weather becomes warmer.
What does a barometer measure?
air pressure
Is this statement true or false:
Wind moves from areas of high pressure to areas of low pressure
true
High pressure usually brings what type of weather?
dry and sunny weather
Low air pressure often brings clouds and some type of … .
precipitation
What are weather balloons, weather satellites, and weather radar all used to help meteorologists do?
Tell what the weather might be like tomorrow
Meteorologists collect weather data from various sources, such as weather ballons and …
Weather radar
Weather stations
Weather satellites
Explain how weather balloons are used to take weather measurements
Weather balloons lift small boxes of instruments into the air. As the balloon rises, temperature, humidity, and air pressure are measured and the information is sent to a station on the ground using radio signals. When the observations are finished, the balloon is made to pop and the box floats down on a parachute.
How do warm fronts and cold fronts look like?
warm: line with half circles
cold: line with triangles
What tool is used to measure the outside temperature?
Thermometer
What tool is used to measure air pressure?
barometer
Humidity in the air is measured with what?
Hygrometer
How does snow form?
water vapor freezes into crystals
The Beaufort scale helps measure relative wind …
speed
What do frozen water drops become when they are carried back up into the sky by the wind and more layers of ice form on them?
hail
Low air pressure brings clouds and some type of …
precipitation
Which weather instrument takes photos of clouds from space?
weather satellite
Humidity is the amount of … in the air
water vapor
Most changes in weather occur along ….
fronts
Is it true or false,
Air masses meet at fronts
true
Is it true or false,
At a cold front, cold air quickly pushes under warm air, causing strong winds and precipitation – often thunderstorms.
true
Is it true or false,
Sleet forms as tiny water droplets collide and form larger drops, which fall to the ground without freezing.
false
Describe two ways to measure wind direction
Weathervane Compass and ribbon Watching the smoke from chimney Watching tree branches Throwing grass clippings in the air and watching them fall
How do weather balloons help meteorologists forecast the weather?
They collect data for meteorologists, such as temperature, wind direction and speed, air pressure, and humidity, at different heights above the ground.
Name the four types of precipitation
snow
rain
sleet
hail
Areas of high air pressure are labeled with which symbol?
H
What type of weather would you expect an area with high pressure to have-cloudy and rainy or sunny and dry?
sunny and dry
