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Hypothesis #1: Which do you think will heat up faster----- sand or water?

Hypothesis #1: Which do you think will heat up faster----- sand or water? Hypothesis #2: Which do you think will cool faster---- sand or water? . Red text pg. # 546. Heating Earth’s Surface. Heating Earth’s Surface. Conclusion pg. 547 #’s 1-8.

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Hypothesis #1: Which do you think will heat up faster----- sand or water?

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  1. Hypothesis #1: Which do you think will heat up faster----- sand or water? • Hypothesis #2: Which do you think will cool faster---- sand or water? Red text pg. # 546

  2. Heating Earth’s Surface

  3. Heating Earth’s Surface

  4. Conclusion pg. 547 #’s 1-8

  5. The Global warming theory relates to the increase in the average temperature of the Earth's surface that has been observed in recent years, and it is projected to continue. It is debated as to whether this is a natural occurrence or whether human activity has impacted or accelerated it. Global Warming

  6. III. Winds & Fronts

  7. State of the atmosphere at a specific time and place • Includes such conditions as air pressure, wind, temperature, and moisture in the air • Temperature is a measure of air molecule movement • Sun’s energy causes air molecules to move rapidly; temperatures are high and it feels warm • When less of the Sun’s energy reaches air molecules, they move less rapidly and it feels cold What is Weather?

  8. Energy is transferred between fast-moving molecules and slower-moving molecules • CONDUCTION – transfer of energy when molecules collide • CONVECTION – occurs when warm air rises and cool air sinks; it’s the transfer of heat, usually in liquids or gases What is Weather?

  9. You might pick heat or sun….but another good choice would be Convection If we were to pick one term to help explain why we have weather, what do you think would be a good word?

  10. After the atmosphere is warmed by radiation and conduction, the heat is transferred throughout the atmosphere by convection. • Since warmed air has more space between the molecules, it’s less dense and rises • Cooled air is more dense and tends to sink • In general, air near the equator tends to rise and air near the poles tends to sink

  11. -Caused by a difference in air pressure due to unequal heating of the atmosphere. • Two types of winds: a. local b. global A. How wind develops:

  12. 1. Heating the air, decreases pressure (warm air rises creating low pressure) 2. Cool air rushes into replace the warm air (cooler dense air, produces high pressure) 3. As air goes from high to low pressure, winds form. Based on your knowledge about the pressure gradient ( the difference between two pressure systems)which states would be susceptible to the greatest wind speeds? B. Winds are created by….

  13. Sea breeze- warm air expands & rises over land, & cool sea/lake air moves toward the land. C. Local Winds

  14. 2. Land breeze- warm air over water rises, cool land air moves toward the water. How would a Mountain Valley wind occur?

  15. Winds occur on a larger scale. Read pages 529-533 black text and complete the topic questions 11-14. Draw two diagrams; one of a pot of water and one of a globe and follow along with Mr. Musselman http://www.youtube.com/watch?v=5QOVwX-6g-Q&list=FLS3pSJL90XUUrUDpufvtYwg&index=1

  16. Air rises in warm regions where pressure is low (convection) ex the tropics Air descends in cold areas where pressure is high (subsidence) ex the poles Remember! Air rises over warm areas and sinks over cold areas

  17. 1. Don’t travel North and South because of the Earth rotating on its axis. a. 4 Types of Global Winds – Doldrums: calm, warm winds at equator – Trade Winds: 30° N&S of equator, gentle/sinking air – Prevailing Westerlies: 30-60° Strong (big temp. diff.), impacts U.S. weather – Polar Easterlies: 60-90° cold, weak winds from poles D. Global Winds

  18. Polar Easterlies c. b. Cool air descend d. Prevailing Westerlies e. Trade winds f. a. Warm air rises Doldrums e. Trade winds D. Global Winds d. Prevailing Westerlies c. Polar Easterlies

  19. 1. Winds do not blow directly from high to low pressure …. they get deflected by the Coriolis force http://www.classzone.com/books/earth_science/terc/content/visualizations/es1904/es1904page01.cfm E. Coriolis Effect

  20. If you were to attempt to fly a hot air balloon around the world, what would be your planned path of travel? How many days would it take? How would you survive? Would your balloon actually make it all the way around? Explain why or why not.

  21. Air Masses and Fronts

  22. Temperature 1. Air masses from N 50º latitude POLAR (P) 2. Air masses from the tropics TROPICAL (T) F. North American Air Masses

  23. Humidity 1. Air masses from over oceans MARITIME (m) 2. Air masses from over land CONTINENTAL (c) North American Air Masses

  24. cP 2. 4. 1. mP mP cP 3. 6. cT Local Air Masses mT 5. mT 7.

  25. 1. The Boundary between two different air masses. a. Water vapor drives storm systems G. Front

  26. Name: Cold Front What’s happening: cold air moves into warm air Result: Lot’s of rain, cool temps, thunderstorms D. Types of Fronts

  27. Name: Warm front What’s happening: warm air moves into cold air Result: little rain/clouds, warmer temps.

  28. Name: Stationary front What’s happening: neither masses move the other Result: clouds & precipitation

  29. Name: Occluded front What’s happening: warm air mass caught between cold air masses Result: warm air cut off, cloudy & rain

  30. Front questions pg. 585 #’s 1-2

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