Atmosphere Basics
Water Properties
Relative Humidity and Clouds
Air Masses and Wind
Extreme Weather
100
As the temperature of a gas increases what happens to its volume?
Increases
100
Water sticks to water is called...
cohesion
100
Relative humidity is a measurement of the amount of water in the air in comparison to what?
The ability of air to hold water
100
What type of weather would you expect to find along a cold front?
Stormy weather
100
What charge at the bottom of storm clouds causes lightning to strike the ground?
Negative
200
In which atmospheric layer does weather occur?
Troposphere
200
Water sticks to other things is called...
adhesion
200
What do we call it when air has reached 100% relative humidity?
Dew point
200
What are the two characteristics we use to describe an air mass.
Temperature and moisture (humidity)
200
What causes thunder?
Rapidly heating and expanding air
300
As you increase the temperature of air what happens to the movement and spacing of molecules?
Move faster and spread apart
300
What property of water allows low mass objects to "float" on water even though they have higher density?
Surface tension
300
Warm air has a _____ ability to hold water than cool air.
higher
300
Air always moves from areas of _____ pressure to areas of _____ pressure.
high; low
300
What characteristics do the eye of a hurricane posses?
Low pressure, calm
400
What is the heat source for the troposphere?
Heat re-radiating from the Earth’s surface
400
Water has a high specific heat, what does that allow water to do?
Absorb a lot of thermal energy without changing temperature
400
Where does air have to be moving in order for there to be cloud formation?
Up or rising
400
What do we call the actual temperature that humans feel due to wind?
Wind chill
400
What is the “fuel” for a growing hurricane?
warm ocean water
500
Why does the stratosphere get warmer as altitude increases?
Ozone layer absorbs ultra violet radiation
500
When you put drops of water of a penny the water can bubble over the edge without overflowing off. What property of water allows that to happen?
cohesion
500
What three things are necessary in order for a cloud to form?
Water vapor, seeds, decrease in pressure
500
What is the coriolis effect?
The effect that causes the movement of air on earth to curve due to earth’s rotation.
500
What property does the center of a tornado have that causes the “sucking” effect of the tornado?
extreme low pressure
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