fronts
Meeting two air masses is called ?
Fronts
Collection of millions of tiny water droplets/ ice crystals
what is cloud ?
Lighting , thunder ra,in and hail
thunderstorm
Where should you go if there is a tornado?
away from windows or under furniture or basement
What comes first? Thunder or lightning?
lightning
what it is called when pressure is excreted on the object
Air pressure
clouds form when watervapor changes to liquid is called
condensation
What time of the year are thunderstorms most likely to occur
spring and summer
A tornado can happen __________________.
anytime
In USA how many Tornadoes per year
800
________ air sinks because it is more dense than ________ air
cold , warm
Which of following typically has the highest altitude of cloud base?
cirrus
Stages in thunderstorm development
towering , mature and dissipating
What time of day is a tornado MOST likely to occur?
late afternoon or evening
lighting can occur at same place twice
yes
This is the measure of how much water vapor is in the air.
Humidity
heap heavy clouds
cumulonimbus
What do you HEAR during a thunderstorm?
Thunder
Tornadoes only happen on land
no
A tornado's wind can reach ________________ MPH.
300
A _____________ is a weather forecaster who predicts the weather.
meteorologist
Fog is which type of cloud?
Stratus
What causes a thunderstorm to form?
Both a warm and cold front
states where tornadoes are often seen
Tornado ally
What two states have never had a tornado?
Hawaii & Alaska