1. Air Pressure and Wind pgs. D52-D63 Chapter 10 Lesson 6

2. 1. wind Air that moves horizontally and just over the ground. Air that moves horizontally and just over the ground. The flow of air The flow of air

3. 2. convection cell A part of the atmosphere where air moves in a circular pattern because of unequal heating and cooling. A part of the atmosphere where air moves in a circular pattern because of unequal heating and cooling. Also, it is a pattern of air rising, sinking, and blowing horizontally Also, it is a pattern of air rising, sinking, and blowing horizontally =

4. 3. sea breeze A wind that blows from the sea to the land A wind that blows from the sea to the land

5. 4. land breeze Air blown from land toward the water. Air blown from land toward the water.

6. 5. Coriolis effect Makes the wind curve to the right in the Northern Hemisphere Makes the wind curve to the right in the Northern Hemisphere Causes winds to blow to curve to the left in the Southern Hemisphere. Causes winds to blow to curve to the left in the Southern Hemisphere.

7. 6. Winds that effect the United States. prevailing westerlies these winds blow from the west to the east these winds blow from the west to the eastwesteastwesteast they effect the United States and us (North Carolinians) they effect the United States and us (North Carolinians) effects places located between 30 N and 60 N (latitude and longitude of the United States) effects places located between 30 N and 60 N (latitude and longitude of the United States) Why are they important? Why are they important? they carry the warm, waters and winds to the western coasts of continents they carry the warm, waters and winds to the western coasts of continents very variable (changing) and produce stormy weather very variable (changing) and produce stormy weather United States is here West East West East California to North Carolina California to North Carolina

8. 7. What can get in the way of the prevailing westerlies? Mountains Mountains Cities/buildings Cities/buildings Trees/forests Trees/forests Which way do you think prevailing easterlies blow?

9. 8. isobar A line on a map connecting places with equal air pressure A line on a map connecting places with equal air pressure

10. 9. air pressure As elevation increases, air pressure decreases. As elevation increases, air pressure decreases. As you get higher in altitude, air pressure decreases. As you get higher in altitude, air pressure decreases.

11. 10. updraft Air that rises Air that rises

12. Review: humidity Amount of moisture in the air Amount of moisture in the air Relative humidity is a comparison between how much water vapor is in the air and how much the air can hold. Relative humidity is a comparison between how much water vapor is in the air and how much the air can hold.

13. When temperatures vary from location to location, which weather condition plays a role in creating winds when it also changes? When temperatures vary from location to location, which weather condition plays a role in creating winds when it also changes? A) humidity B) air pressure C) cloud over D) precipitation What causes differences in air pressure? What causes differences in air pressure? A) clouds B) lightning C) pollution D) temperature

14. A student observes the changes in the pressure and temperature in a region, as shown in the table. TimePressure (millibar) Temperatur e (F) 9 a.m.99687 10 a.m.99288 11 a.m.99089 12 p.m.98592 What is the most appropriate prediction about the approaching weather for this region? A) A)calm B) B)cold C) C)fair D) D)stormy

15. The diagram represents the atmospheric conditions at a certain location. Up Left Right Down Cold Air Warm Air High Pressure Low Pressure X In which direction will the wind most likely blow from point X? A) A)down B) B)left C) C)right D) D)up