Air masses
What are air masses?
What is large bodies of air with similar temperature and humidity throughout
What happens when a cold front passes?
Cold air pushes under warm air
Brings: thunderstorms, heavy rain, possible snow
Sharp temperature drop after front passes
What type of weather does high pressure usually bring?
Usually brings clear, stable weather
What are the two main reasons air masses get moved across the world?
What is prevailing winds and air masses
_______________________ is the amount of water vapor in the air.
what is humidity
A _______________ air mass forms over the ocean and is hot.
What is maritime tropical
How is a warm front represented on a weather map?
Shown as red line with half circles on weather maps
Which of the following correctly describes a low-pressure system?
A) Air sinks and moves clockwise
B) Air rises and moves counterclockwise
C) It always brings dry and warm weather
D) It forms only over oceans
B Air rises and moves counterclockwise
Why does warm air rise and cold air sink in the atmosphere?
What is cold air is more dense
What type of front brings humid weather
What is a warm front
Which factor is NOT used to classify an air mass?
A) Temperature
B) Humidity
C) Source region
D) Wind speed
What is wind Speed
What type of weather does a stationary front bring?
persistent cloudy, wet weather
What type of pressure system leads to hurricanes
What is a low pressure system
Which layer of the atmosphere contains most of Earth’s weather?
What is the troposphere
What is the term for the long term humidity, amount of rainfall, and temperature of an area?
What is climate
What air mass is cold and dry
What is continental polar
A ______________ front forms when a warm air mass rises over a cold air mass, bringing steady rain or snow.
what is warm
What type of weather does low pressure usually bring?
Usually brings cloudy, unstable weather
What are the two things hurricanes need to form?
What is warm ocean water (moist, rising air) and wind
What type of fronts symbol is purple triangles and semicircles on the same side?
What is an occluded front
What type of air mass forms over wet cold places
What is maritime polar
What type of front involves two cold air masses trapping warm air and pushing it up?
What is an occluded front
Why do low-pressure systems often lead to stormy weather?
What is because rising air cools and condenses, forming clouds and precipitation
What instrument measures air pressure?
What is barometer
If an area randomly gets hotter and drier what kind of air mass is over that area
What is continental tropical