7th Grade Science Winds

Based on Science Notes Page 24, Science Binder

What is Wind

Horizontal movement of air from high pressure to low pressure

What Causes Wind

Caused in difference of weather, uneven heating of the atmosphere

What instrument measures wind direction?

Using a Wind Vane

What measures Wind Speed?

Using an anerometer

Define Wind Chill Factor

The temperature that a person feels, because of the wind.

Define Local Winds

Winds that move a short distance.

What Causes Local Winds?

Caused by the unequal heating of Earth’s surface.

What is Sea Breeze

Land heats faster, than the ocean in day, so warm air rises making low pressure.

Define Global Winds

They travel a longer distance.

What Causes Global Winds

Caused by the uneven heating at Earth’s surface.

Define Coriolis Effect in Northern hemisphere

This forces winds, to shift towards the right

Define Coriolis Effect in Southern hemisphere

This forces winds to shift towards the left

Define Jet Stream

A narrow bands of strong winds, that pushes large air masses.

Doldrum

Little or no wind (equator)

Horse Lattitude

Air stops moving toward the poles, and sinks

Trade Winds

Go toward the equator, (30-0)

Prevailing Westerlies

Blows away from the horse lattitude (30-60)

Polar Easterlies 

Blows cold air away from the poles (60-poles)

A south wind blows toward south

False

Land Breezes occur at night

True (Question 6 Notes)

Low Pressure Causes

Precipitation and Storms

Why does low pressure cause precipitation and storms?

Because, more air rises to form clouds.

Where does Low Pressure Flow in Southern

Clockwise

Where does Low Pressure Flow in Northern

Counterclockwise

High Pressure Causes

Sunny and clear

Why does High Pressure cause sunny and clear

Becuase, there is not a lot of air, above to form clouds, everything is on us.

Where does High Pressure Flow in the Northern

Clockwise

Where does High Pressure Flow in the Southern

Counterclockwise

What two factors that air pressure depends on

Temperature & Density