Make a Wind Vane.

You can measure the wind's direction by using a wind vane.

Mrs. Deringer's

Winds Web Page

Wind is the movement of air. Winds are caused by uneven heating of the Earth's surface. The unequal heating of the earth's surface causes differences in air pressure. The air travels from high pressure to low pressure. The larger the difference in air pressure the faster the wind blows.

Winds are named from where they blow from. For example the Prevailing Westerlies blow from the west to the east.

Make an Anemometer

You can measure the wind's speed by using an anemometer.

Are there different types of winds?

On Earth there are several major wind belts called Global Winds. These winds travel in a pattern and cover long distances.

The Global Winds are:

Polar Easterlies: From 60-90 degrees latitude. These winds are very weak.
Prevailing Westerlies: From 30-60 degrees latitude. These are the winds that effect the weather patterns in the United States. They are very strong winds.
Trade Winds From 0 - 30 degrees latitude
. These are the winds sailors used for their trade routes. Where the trade winds meet at the equator there is an area of calm called the Doldrums

Local Winds:
What are Land and Sea Breezes? We learned during our lab that land heats up faster than water. While water takes longer to warm up it retains its heat longer than the land. This causes temperature above each different type of surface to be different. During the day, the land heats up faster, and the hot air rises, creating an area of lower pressure. Wind blows from the sea to the land. This is a sea breeze.
At night, the land cools off faster than the sea. Cooler air descends creating an area of higher pressure. Wind blows from the land to the sea. This is a land breeze.

The Jet Stream is a current of fast moving air in the upper atmosphere. They blow from the west to the east. The can reach speeds of more than 275 mph.

 

Click Below to learn the differences between Global and Local Winds

Ready to take the practice quiz?
Click here to go to the
Winds Practice Quiz

Click Here to view the Beaufort Wind Scale

Developed in 1805 by Sir Francis Beaufort of England

 


Back to the Earth Science Links