1
What form mainly in high pressure zones?
Air masses
The amount of snow that falls is measured with a snow ________.
gauge
What is the highest category of tornadoes?
F6
_______ is a cloud located at or near the ground?
Fog
What is taken into account air temperature and relative humidity?
heat index
Two air masses meet at a ___________?
front
The temperature at which air becomes saturated with water is called?
Dew point
These depict information from computer models and human observation .
weather maps
At a ______________, a cold air mass forces a warmer air mass upwards.
cold front
Air that heats up, rises and form a ________ pressure zone.
low
This is a batch of air that has nearly the same temperature and humidity.
air mass
How is weather predicted?
Weathermen collects as much data as possible about the current state of the atmosphere (temperature, humidity, and wind).
What is the water vapor a certain volume of air contains relative to the maximum amount it can contain?
Humidity
What type of front stays in one place?
Stationary front
This is s system of winds rotating counterclockwise around a low pressure system in the northern hemisphere.
Cyclone
This measures: wind speed, temperature, wind direction, humidity, and precipitation.
Weather instruments
cold, warm, occluded, stationary
Why is it so difficult to predict the weather?
Weather models rapidly change each minute. Some storms could run out of energy before they reach another destination.