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Unit Keypoints - Franklin College

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country suffers from hurricanes. The weather changes due to the different<br />

positions the states are in compared to the equator.<br />

Air and Wind<br />

1. What is wind<br />

Wind is air in natural motion, moving horizontally at any velocity<br />

along the earth’s surface. Wind is able to transport small materials, such<br />

as seeds, for long distances.<br />

2.a. The affect that heat has on air<br />

When air gets warmer, it expands. This causes warm air to get<br />

thinner and it float upward. Cold air does the opposite of warm air.<br />

2.1.Wind observation<br />

The wind affects the climate and the air pressure. Many<br />

elements in the environment cause changes in the wind.<br />

2.1.a. Learn about anemometers<br />

An anemometer is an instrument used to measure wind<br />

speed. The anemometer is spun by the wind and the amount of spins per<br />

minute are counted and multiplied to get the wind speed.<br />

2.1.b. Why certain areas of the country are windier than others<br />

Where a certain state or country is located plays a big part in how<br />

windy that area will be. Many states located near water tend to have more<br />

wind since there is a warm and cold air exchange happening.<br />

2.2. Wind direction<br />

The air in our atmosphere moves in many directions at varying<br />

speeds. Air is a fluid that moves in a path. Warmer air rises while<br />

cooler air sinks which creates the environment for flowing air<br />

movement. Air moves from an area of high pressure (cold) to an area<br />

of low pressure (warm).<br />

2.2.a. Learn about weather vanes<br />

Weather vanes are instruments used to determine what

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