# 10/8/13 31st Day of School Learning Goal (7.E.1.3): I will be able to explain how the difference in high- and low-pressure systems affect our weather.

## Presentation on theme: "10/8/13 31st Day of School Learning Goal (7.E.1.3): I will be able to explain how the difference in high- and low-pressure systems affect our weather."— Presentation transcript:

10/8/13 31st Day of School Learning Goal (7.E.1.3): I will be able to explain how the difference in high- and low-pressure systems affect our weather. Due Today: Flashcards and Questions #4, 5 & 6 page A85. Evening Assignment: Finish flashcards & questions #5 & 6 page A96.

Do Now Use Intellicast.com to answer the following:Intellicast.com 1)What type of pressure system is over Kansas City, MO? 2)What type of weather will they have? 3)Why was this morning cooler than yesterday morning?

Do Now Use Intellicast.com to answer the following:Intellicast.com 1)What type of pressure system is over Kansas City, MO? High Pressure 2)What type of weather will they have? Sunny, calm 3)Why was this morning cooler than yesterday morning? Cold front arrived yesterday

Knowledge Check 4.Explain how air moves differently in low- and high- pressure systems.

Knowledge Check 4.Explain how air moves differently in low- and high- pressure systems. Low-Pressure System High-Pressure System Air spirals around a low- Air sinks into a high- pressure center. Moves inward and up Spreads outward Counter-clockwise Clock-wise

Knowledge Check 5.If the weather becomes stormy for a short time and then becomes colder, which type of front has passed?

Knowledge Check 5.If the weather becomes stormy for a short time and then becomes colder, which type of front has passed? A cold front has passed which leaves cooler, dry air.

Knowledge Check 6.You check a barometer and observe that the air pressure has been dropping all day. Is tonight’s weather more likely to be calm or stormy?

Knowledge Check 6.You check a barometer and observe that the air pressure has been dropping all day. Is tonight’s weather more likely to be calm or stormy? It is likely to be stormy. Decreasing pressure indicates that a low-pressure system or front is approaching. Both are associated with clouds and possible storms.

Thunderstorm formation A thunderstorm is a storm with lightning and thunder. Watch the animation to help you visualize how thunderstorms form. http://www.canadiangeographic.ca/atlas/themes.aspx?id=weather&sub=weath er_phenomena_thunderstorm

Lightning A lightning is an electrical discharged produce by friction between air molecules moving in a thunderstorm. Watch the animation to help you learn more about lightning. http://video.nationalgeographic.com/video/kids/forces-of-nature-kids/lightning-101-kids/