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7th Grade Chapter 6 Lesson 3
7th Grade Chapter 6 Lesson 3
7th Grade Chapter 6 Lesson 3
7th Grade Chapter 6 Lesson 3
7th Grade Chapter 6 Lesson 3
7th Grade Chapter 6 Lesson 3
7th Grade Chapter 6 Lesson 3
7th Grade Chapter 6 Lesson 3
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7th Grade Chapter 6 Lesson 3

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For Student Use Only

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  • 1. 7th Grade Chapter 6 Lesson 3 <ul><ul><li>Pgs. 207 - 211 </li></ul></ul><ul><ul><li>For Student Use Only </li></ul></ul>
  • 2. Local Winds <ul><li>Wind: </li></ul><ul><ul><li>Horizontal movement of air </li></ul></ul><ul><li>Vertical Movement of Air: </li></ul><ul><ul><li>Current, updraft, or downdraft </li></ul></ul><ul><ul><ul><li>Upward air- ascending </li></ul></ul></ul><ul><ul><ul><li>Downward air- subsiding </li></ul></ul></ul><ul><li>Air heats by: Conduction </li></ul><ul><ul><li>The DIRECT transfer of heat from one object to another </li></ul></ul>
  • 3. Local Winds <ul><li>Local Wind- wind movement in a smaller area </li></ul><ul><li>Heat is transferred from molecule to molecule </li></ul><ul><ul><li>Cold ground and cold air have little heat to pass on </li></ul></ul><ul><ul><li>Air can help control the temperature of a region </li></ul></ul><ul><ul><li>Air can be warm or cool </li></ul></ul><ul><li>Air travels: </li></ul><ul><ul><li>Air always goes from an area of high pressure to an area of low pressure </li></ul></ul>
  • 4. Local Winds <ul><li>Warm Air= </li></ul><ul><ul><li>Faster molecules </li></ul></ul><ul><ul><li>More spread out </li></ul></ul><ul><ul><li>Lower pressure (rises) </li></ul></ul><ul><li>Cold Air= </li></ul><ul><ul><li>Slower molecules </li></ul></ul><ul><ul><li>Close together </li></ul></ul><ul><ul><li>Higher Pressure </li></ul></ul>
  • 5. Local Winds <ul><li>Water and Land: </li></ul><ul><ul><li>Sea breezes (or lake breezes) bring cool air during the day </li></ul></ul><ul><ul><ul><li>Cool air from the water rushes to fill the area where the hot land air rose </li></ul></ul></ul><ul><li>Woods: </li></ul><ul><ul><li>Forest breeze </li></ul></ul><ul><ul><ul><li>Cool air from under the tress rushes to fill the area where there are no trees and the land is warm and air is rising </li></ul></ul></ul>
  • 6. Local Winds <ul><li>Valley Breeze: </li></ul><ul><ul><li>Day: Breeze blows up from the valley </li></ul></ul><ul><ul><ul><li>Mountains peaks warm more quickly than the valley </li></ul></ul></ul><ul><ul><ul><li>Cool air rises up to the warm mountain from the cool valley </li></ul></ul></ul><ul><li>Mountain Breeze: </li></ul><ul><ul><li>Night: Breeze blows from the mountain </li></ul></ul><ul><ul><ul><li>Valley cools very slowly, mountain cools quickly </li></ul></ul></ul><ul><ul><ul><li>Air goes from cooler area to warmer area </li></ul></ul></ul>
  • 7. Local Winds <ul><li>Katabatic Winds: </li></ul><ul><ul><li>Movements of cold air from higher elevations to lower elevations </li></ul></ul><ul><ul><li>Cool air from mountains rush to fill warmer areas </li></ul></ul>
  • 8. Local Winds <ul><li>Foehn (Alps) and Chinook (Am. Rockies): </li></ul><ul><ul><li>Gusty winds caused by cold air seeking an area of warm air </li></ul></ul><ul><ul><ul><li>Windward: side of mountain facing wind, warm air gets forced up the mountain and creates clouds (as air gets cooler) (Note: Condensation helps air stay warm) </li></ul></ul></ul><ul><ul><ul><li>Leeward: side of the mountain facing away from wind: warm air that is now drier blows over surface and brings warmer, dry air to leeward side </li></ul></ul></ul>

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