Front
Where 2 air masses meet and do not mix.
What is a front?
1. maritime tropical – rainy/humid and warm maritime polar – rainy/humid and cold
continental tropical – dry and warm continental polar – dry and cold
What are The airmasses in the us
Sleet freezes as it falls through a layer of cold air; freezing rain freezes on a cold surface.
How is Freezing rain and and sleet diffrent?
Precipitation is any form of WATER that falls from clouds.
What is percipitation
A warm and a cold air mass meet, but neither is strong enough to move the other; just stays there, not
moving or moving very slowly.
What is a stationary front?
Prevailing westerlies push the air masses from west to east.
What is the wind that moves airmasses and what direction?
The condition of Earth’s atmosphere at a particular time and place.
What is weather?
warm air can hold MORE water vapor, cool air can hold LESS water vapor
How does the temperature of the air affect the
amount of water vapor it can hold?
A QUICK moving cold air mass moves under an warm air mass, causes stormy weather.
What is a cold front?
Changing temperatures cause convection currents to take place.
Less dense, warm air rising...cool, more dense air sinking; continuous circulation.
What is the cause of convection currents?
Saturated air has a greater amount of water vapor in it than air that is not saturated.
How is saturated air different than air that is not
saturated?
What instrument is used to measure relative
humidity?
Temperature?
Psychrometer
Thermometer
1. A warm air mass slowly moves in, rises up and over the cool air mass; has long periods of light
rain/snow.
2. cold fronts move quickly; warm fronts move slowly
1. What is a warm front
2. What is the speed of a cold front to warm front
The envelope of gases that surround our planet.
What is the atmosphere?
In a cumulonimbus cloud, strong winds pick up rain drops and push them up high, they freeze, fall and
get covered in rain, wind picks them up and pushes them high again, freezes again, cycle keeps
repeating until the wind isn’t strong enough to push the hail up.
What is the process of hail formation?
Where does water vapor come from?
Evaporation from bodies of water.
1. A warm air mass is trapped between 2 cold air masses, the warm air is pushed up as the 2 cold air
masses join together, cutting off the warm air from the surface.
3.Explain the type of weather for each front.
symbol.
1. what is a occluded front
3.Warm front Cloudy skies, showers, light rain,
warmer temps, higher humidity
Cold front Strong thunderstorms, colder
temps
Stationary front Many days of rain
Occluded front Severe, strong storms
the temperature at which water vapor turns into condensation.
(saturation occurs, dew forms)
2.
The percentage of water vapor actually in the air versus the amount of water vapor the air can hold at
that temperature.
What is the definition of dew point and what happens at dew point.
2. What is relative humidity
In what kind of clouds do thunderstorms and
tornadoes form?
What is cumulonimbus cloud?
Bonus question Doesnt count if you dont get it right but Who invented the thermometer.
Galileo Galilei