Presentation on theme: "SPI 0607.8.2 Recognize the connection between the suns energy and the wind."— Presentation transcript:
SPI Recognize the connection between the suns energy and the wind.
El Niño El Niño landbreeze land breeze CoriolisEffect Coriolis Effect La Niña La Niña seabreeze sea breeze jetstream jet stream
Before we begin, lets make the 4-fold windowpane. Coriolis Effect Land Breeze Jet Stream Sea Breeze
Look at the fan… 1.What causes the wind to move? Electricity is running a motor. It causes the blade to move. As the blades turn, they move the air. 2.On your notecard, Hypothesize how your think the air outside moves. Is there a fan that makes the wind blow? 3.Share your thoughts with a neighbor or table.
Focus on the following: - What causes some areas to be warmer than others? - What part of Earth receives the most sunlight throughout the year?
Forming Wind Uneven heating of Earths surface by the Sun causes some areas to be warmer than others. Remember: Hotter air is less dense, so… heated air from the equator rises or moves toward the poles. Cooler air is more dense, so… the cooler air from the poles falls or moves toward the equator. These are the convection currents that encircle the globe. p. 309
Focus on the following: - What is the Coriolis Effect?
What Would Happen If… You and a friend were sitting on opposite ends of a merry-go-round and you threw a ball to your friend. Would the ball get directly to your fried? With a partner, discuss why you think it would or would not reach your friend. Check the merry-go-round for a video demonstration. p. 310
The rotation of Earth causes moving air and water to APPEAR to turn to the right north of the equator and to the left south of the equator. It is all about PERSPECTIVE!!!!! Confused??? Try this… 1)Stand up facing the board. Point to something on your right. 2)Turn around 180 ˚ 3)Point to the same spot. Is your original point still on your right? Confused??? Try this… 1)S tand up facing the board. Point to something on your right. 2)T urn around 180˚ 3)P oint to the same spot. Is your original point still on your right? p. 310
If the Earth did not rotate at all, the winds would simply move straight up and down between the equator and the poles. p. 310
On your note card, write and complete the following sentences. 1)The uneven heating of the Earth is due to… 2)The Coriolis Effect is… 3)It is caused by… Share with your partner or table.
Focus on the following: - Surface Winds Prevailing Westerlies Trade Winds - Winds in the Upper Troposphere Jet Streams
Winds blowing from 30 ˚ N and 30 ˚ S towards the equator are called the TRADE WINDS. Why were they called the trade winds? Early sailors used these dependable currents to establish trade routes. p. 312
Winds blowing between 30 ˚ and 60 ˚ latitude travel opposite of the trade winds. These are called the PREVAILING WESTERLIES. Why are the prevailing westerlies important? They are responsible for much of the movement of weather in N. America. p. 312
Winds blowing near the North and South poles are called the POLAR EASTERLIES. Guess what…THE WATER IS COLD HERE! (seriously) The cold waters here travel back towards the equator. p. 312
What phenomena occur in the troposphere only??? THE WEATHER!!!!!!!!!!!!!!! The JET STREAMS are narrow bands of strong winds that blow near the top of the troposphere. North of jet streams you find cold, dry air. South of jet streams you find warmer, more moist air.
Pilots flying east will try to fly in the jet streams due to their increased speed, causing pilots to make quicker trips and using less fuel. p. 312
Read each statement, then decide if you agree (thumbs up) or disagree (thumbs down). 1.The Earth rotates from west to east. 2.The trade winds occur from 60 ˚ N and 60 ˚ S towards the equator, and are named because they were originally used by sailor who used these currents to set up trade routes. 3.To the south of the polar jet stream you would find colder, drier weather. 4.Pilots who are flying east will try to use the jet streams to save more fuel and time.
Focus on the following: - The differences between sea breezes and land breezes.
Convection currents over areas where the land meets the sea can cause wind. WHATS THE DIFFERENCE? SEA BREEZE LAND BREEZE p. 313
What makes a sea breeze a sea breeze??? Occurs during the daytime. (notice the sun shining!) Solar radiation warms the land faster that the water. Air over the land is heated and rises. (convection current starts!) Cooler, denser air has higher pressure and falls toward the ocean, pushing the cooler air off the sea and towards the land. p. 313
What makes a LAND breeze a LAND breeze??? Occurs at night. (notice the moon!) At night, the air over land cools faster than the ocean. Air over the warmer water begins to rise. Cooler, denser air over the land has higher pressure and falls toward the land, pushing the cooler air off the land and towards the sea. p. 313
On the back of your note card, create a text message to your BFF describing how a land breeze forms or how a sea breeze forms. Remember… details… details! Help! I need the 411 on land breezes and sea breezes! Sho me wat u got!