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Objective 2: Relate energy sources and transformation to the effects on Earth systems.
1. Describe the effect of solar energy on the determination of weather. 2. Explain how uneven heating at the equator and polar regions creates atmospheric currents that move heat energy around Earth.
The following are covered from the Utah State core in this lesson:
3. Describe the Coriolis effect and its role in global wind patterns.
4. Relate how weather patterns are the result of interactions among air currents, and topography.
Wind is air moving from areas of high pressure to areas of
low pressure.
Wind is caused by uneven heating of Earth and its
atmosphere.
Identify the areas that have warm and cold air.
Which area has the most dense air?
Cold Air
Warm Air
Cold Air
Warm AirDense Air Less Dense Air
Which sides have high and low air pressures?
Cold Air
Warm AirDense Air Less Dense Air
High Air Pressure Low Air Pressure
What is the rule for atmospheric pressure reaching equilibrium?
Cold Air
Warm AirDense Air Less Dense Air
High Air Pressure Low Air Pressure
Which way will the air molecules begin to move?
Cold Air
Warm AirDense Air Less Dense Air
High Air Pressure Low Air Pressure
When will the air movement stop?
The atmosphere is now at equlibrium.
Cold Air
Warm AirDense Air Less Dense Air
High Air Pressure Low Air Pressure
The movement of air is called ____?
wind
A
B
C
Which area receives
direct sunlight (A,
B, or C)?The poles The poles always always receive receive indirect indirect sunlightsunlight
(light hits at (light hits at an angle).an angle).The equator The equator
always always receives receives
direct direct sunlight.sunlight.
Cold Cold AirAir
Cold AirCold Air
Warm AirWarm Air Warm Warm AirAir
ConvectiConvection on
CurrentCurrent
ConvectiConvection on
CurrentCurrent
Convection Convection CurrentCurrent
ConvectioConvection Currentn Current
Coriolis Effect:Coriolis Effect:Winds, and Winds, and weather patterns weather patterns curve due to curve due to Earth’s rotation.Earth’s rotation.
WIND DIRECTIONWIND DIRECTIONLPLP HPHP
CONVECTION CURRENT
CONVECTION CURRENT
SEA BREEZESEA BREEZE
DAYTIMEDAYTIME
LAND BREEZE
CONVECTION CURRENTCONVECTION CURRENT
CONVECTION CURRENTCONVECTION CURRENT
HPHP LPLPWIND DIRECTIONWIND DIRECTION
NIGHTTIMENIGHTTIME
Warm air rises Warm air rises upslope during the upslope during the
daytime.daytime.
Cool air sinks Cool air sinks down-slope during down-slope during
the night-time.the night-time.
From what you have just learned about wind in valleys, where should these firefighters
approach the fire and why?
When land is intensely hot, the wet monsoon winds blow from the ocean
onto the land bringing rain.
When the sun is no longer shining directly over the land, the air above the ocean has a lower air pressure. Dry winds flow from the
land out over the ocean, bringing the dry season.