1. Science starter Predicting Practice…again! Use the weather map below to make a prediction of tomorrow’s weather.

2. Science starter Use the weather map below to make a prediction of tomorrow’s weather.

3. Global winds Found in each convection region Look like they curve –Why? Convection regions are in specific locations Earth spins on its axis –What is curving of winds called? Coriolis Effect Dominate direction of winds and how air moves within each region affects weather

4. Coriolis effect Curving of global winds Caused by spinning of earth and unchanging location of convection regions Easterli es

5. Types of global winds Trade Winds –Found in tropical zone Westerly Winds –Found in temperate zone Polar/Easterly Winds –Found in polar zone

6. Trade winds Direction: east to west Region/Zone: tropical Move warm tropical air within the tropical region

7. westerly winds Direction: west to east Region/Zone: temperate Temperate zone has distinct seasons United States is in temperate zone –Our weather systems move west to east

8. Polar/easterly winds Direction: northeast to west Region/Zone: polar Move cold polar air within polar region Move cold polar air toward west

9. Jet stream Fast moving ribbon of air Moves from west to east in Northern Hemisphere Dips and bends Constantly changes positions Air masses & weather systems in path of jet stream are moved by it 2 types: –Polar Jet Stream –Subtropical Jet Stream

10. Jet stream **The facts below are true for the Northern Hemisphere of Earth ONLY** Polar Jet Stream: –Brings down cold polar conditions from north Subtropical Jet Stream: –Brings up warm tropical conditions from south