Scientific Principles
When _____, _____ dense air rises, _____, _____ dense air moves in to take its place.
Warmer, less
Cooler, more
Our model shows this process when warmer air rises and cooler air moves in to take its place.
Convection
Gray clouds on a map show this.
Warmer, closer to Earth
The cooler, denser air mass moves under the warmer, less dense air mass and pushes it up.
Lift
The process in which clouds are formed
Condensation
Low density air columns have ____pressure and high-density air columns have ____pressure.
low, high
The air on our model is heated from below by this.
Conduction
These colors and symbols represents high and low pressure on a weather map.
Red L and Blue H
The boundary between the less dense and more dense air mass.
Front
The process by which liquid surface water is heated by the sun and turns into water vapor.
Evaporation
The air at the Earth's surface is primarily heated by the transfer of ______ from the ground below it.
Thermal Energy
This is transferred from the sun to the Earth's surface.
Solar Energy
Lines on a weather map that join places of equal pressure.
Isobars
When two air masses do not mix quickly and the warmer, less dense, air continues to rise with the cooler air around it.
Instability
High pressure
As water vapor _____, it changes to a liquid and releases energy to the surrounding air.
Condenses
Our model shows that warmer air is _____ than cooler air, therefore it rises when cooler air moves in to take its place.
Less Dense
These are shown on a map by using red and blue lines with symbols on them.
Fronts
The amount of water vapor in the air
Humidity
Warm, less dense, humid air will follow a _____.
Warm front
When warmer less dense air is lifted by cooler more dense air, the less dense air is said to be _____ as it transfers energy to the surrounding air.
Unstable
This is transferred from the Earth's surface to the air above it by the process of conduction.
Thermal Energy
Air pressure is measured in (3)
millibars, inches, inches of Mercury
What is used to measure air pressure?
Barometer
Where would you see more precipitation on a weather map? In an area of high or low pressure?
Low pressure