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Wind Review

Local and Global Winds

QuestionAnswer
The horizontal movement of air from an area of high pressure to an area of low pressure is referred to as wind
The polar easterlies blows from the __________ and to the ____________. from the east to the west
The prevailing westerlies blows from the __________ and to the ____________. from the west to the east
A wind (weather) vane measures wind direction
Winds over short distances are called local winds
Winds that blow in the same direction over long distances are called global winds
Both winds are caused by the unequal heating of Earth by the SUN (which causes differences in air pressure). The air pressure moves from high to low.
What causes the winds to curve, instead of going straight? The rotation of Earth under the wind. This is called the Coriolis Effect
What are the calm (wind) areas of Earth called? Horse Latitude and Doldrums
Where are the Doldrums located? equator
Whare are the horse latitudes located? 30 degrees North and 30 degrees South
Why are the doldrums clam (very little to no wind)? The equator receives direct sunlight, which causes the air to be warm, less dense, and rise. All of the air is rising.
Why are the horse latitudes calm (very little to no wind)? The 30 degree latitudes are cold, high density, sinking air. All of the air is sinking.
How are winds named? From the direction they are coming from
Where would the lowest air pressure be on Earth? Why? The equator because it gets the most direct sunlight
Where would be the highest air pressure be on Earth? Why? The North and South Poles because it gets the most indirect sunlight
What is a land breeze? happens during the night this is when cool air is above the land creating a high pressure and warm air is above the sea creating low pressure then the air moves from the land to the sea creating a land breeze
What is a sea breeze? happens during the day this is when cool air is above the sea creating a high pressure and warm air is above the land creating low pressure then the air moves from the sea to the land creating a sea breeze
What is an instrument that measures the wind speed called? anemometer
What is an insturment that shows the direction the wind is blowing called? wind vane
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