Any time you see this complete the directions! Name:_____________________ 6th Grade Science Date:_______________________ Winds What is wind and why does it move? Wind is moving air. **It moves because of differences in air _________________________. Air moves from areas of __________ pressure to areas of _______ pressure. Types of Winds Global Winds Are part of a pattern of air circulation that moves across the Earth Move large distances and blow in the _____________________ direction. Local Winds Move ______________________ distances and blow from any direction Bill Nye Wind Video Wind is cause by the ___________________ from the Sun and the _____________________ of the Earth. What did the “great big plastic wind box of science” show? __________________ ______________________________________________________________ ______________________________________________________________ Global Winds Label the Earth with the 3 Global Winds: Trade Winds Blow from 30 ° latitude to 0 ° (the equator). Early “_________________________” used these winds to sail from Europe to the Americas. The trade winds of the north and south meet at the equator (the doldrums). Flow from the ________________ to the southwest in the northern hemisphere. Flow from the ________________ to the northwest in the southern hemisphere. Westerlies Blow from the ____________° to _____________° latitudes They flow from the southwest to the northeast in the northern hemisphere. They flow from the northwest to the southeast in the southern hemisphere. Polar Easterlies Blow from the poles to the 60° latitudes. They come ______________ the "poles" and from the "___________________". Global Winds and Pressure Belts Picture What is the name of the convection “cell” between the equator and 30° latitude? ______________________________________________ Coriolis Effect The Earth's _________________________ affects the movement of the winds. The Coriolis Effect is the curving of moving objects, such as wind, by the Earth's rotation. Northern Hemisphere - curve to the _____________________________. Southern Hemisphere - curve to the _____________________________. Coriolis Effect Merry Go Round For someone above looking down on the Merry Go Round, the path ball of the ball appears _____________________________. For the children rolling the ball on the Merry Go Round, the path of the ball appears to _____________________________. What is the Coriolis Effect? Video (FYI: A “round about” is a Merry Go Round ) What did they use to demonstrate the Coriolis Effect? : ____________________ ______________________________________________________________ Pressure Belts Areas of high or low __________________ that occur at about every ________° of latitude. Label the missing pressure belts: Doldrums Areas of low pressure around the ___________________________. This where the __________________________ winds meet. There is little wind because of warm air rising. Doldrums mean "______________________________" in Old English. Horse Latitudes Areas of ___________________ pressure around 30° N and 30° S where the winds are week. When sailors would sail into these latitudes they would have to throw the horses overboard to save _________________________. Poles At north and south poles, there is cold air, so it is a ______________ pressure "belt" (a very small belt"!) The cold air _____________________ and moves away from the poles. Polar Front Areas of low pressure at _________° N and ___________° S. As the cold air from the poles moves across the land, it warms and creates a _______________ pressure belt. Jet Streams How long are the Jet Streams? ______________________________________ How thick are the Jet Streams? _____________________________________ These are areas of high speed winds that blow in the upper troposphere and lower stratosphere. They do ________________ follow regular paths around the Earth. The winds can reach up to ______________ km/h. These can affect the movement of _________________________. They can help in flying. How many Jet Streams are there in the Northern Hemisphere? ______________ Label the missing Jet Streams: Cross Section of the Jet Streams Wind Video What heats and cools faster, land or water? __________________________ Cold air is ______________________. The air molecules need less room to move. You can fit more of them into one area. Warm air is _____________________. Warm air as a _________________ pressure. The ________________________ the pressure differences, the faster the winds. Local Winds These winds are influenced by ____________________________, like shorelines and mountains. Examples: sea and land breezes, _______________________ and valley breezes. Sea and Land Breezes Sea breezes happen during the ________________________. Land breezes happen during the ________________________. Sea Breezes List 2 things you learned from the sea breezes website: 1. ____________________________________________________ 2. ____________________________________________________ Land Breezes List 2 things you learned from the land breezes website: 1. ____________________________________________________ 2. ____________________________________________________ Mountain and Valley Breezes Valley Breezes The sun heats the valley and the air near it during the day. The warm air moves _______________ from the valley. Complete the diagram below: Mountain Breezes At night, mountains cool faster than the valley. Cold air _______________ from the top of the mountain to the valley. Complete the diagram below: