Air Pressure and Air Pressure and Wind Wind

pgs. D52-D63pgs. D52-D63

Chapter 10 Lesson 6Chapter 10 Lesson 6

1. wind1. wind

Air that moves horizontally and just Air that moves horizontally and just over the ground.over the ground.

The flow of airThe flow of air

2. convection cell2. convection cell A part of the atmosphere where A part of the atmosphere where

air moves in a circular pattern air moves in a circular pattern because of unequal heating and because of unequal heating and cooling.cooling.

Also, it is a pattern of air rising, Also, it is a pattern of air rising, sinking, and blowing sinking, and blowing horizontallyhorizontally ==

3. sea breeze3. sea breeze

A wind that blows from the sea A wind that blows from the sea to the landto the land

4. land breeze4. land breeze

Air blown from land toward the Air blown from land toward the water.water.

5. Coriolis effect5. Coriolis effect

Makes the wind curve to the Makes the wind curve to the right in the Northern right in the Northern HemisphereHemisphere

Causes winds to blow to curve to Causes winds to blow to curve to the left in the Southern the left in the Southern Hemisphere.Hemisphere.

6. Winds that effect the 6. Winds that effect the United States.United States.

prevailing westerlies prevailing westerlies

these winds blow from the west to the eastthese winds blow from the west to the east 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 effects places located between 30 N and 60 N (latitude and

longitude of the United States)longitude of the United States) Why are they important?Why are they important?

they carry the warm, waters and winds to the western they carry the warm, waters and winds to the western coasts of continentscoasts of continents

very variable (changing) and very variable (changing) and produce stormy weatherproduce stormy weather

United States is hereUnited States is here West West East East California to North California to North CarolinaCarolina

7. What can get in the 7. What can get in the way of the prevailing way of the prevailing

westerlies?westerlies? MountainsMountains Cities/buildingsCities/buildings Trees/forestsTrees/forests

Which way do you think prevailing Which way do you think prevailing easterlies blow?easterlies blow?

8. isobar8. isobar

A line on a map connecting A line on a map connecting places with equal air pressureplaces with equal air pressure

9. air pressure9. air pressure

As elevation increases, air As elevation increases, air pressure decreases.pressure decreases.

As you get higher in altitude, air As you get higher in altitude, air pressure decreases.pressure decreases.

10. updraft10. updraft

Air that risesAir that rises

Review: humidityReview: humidity

Amount of moisture in the airAmount of moisture in the air Relative humidity is a comparison Relative humidity is a comparison

between how much water vapor is in between how much water vapor is in the air and how much the air can the air and how much the air can hold.hold.

When temperatures vary from location to location, which When temperatures vary from location to location, which weather condition plays a role in creating winds when it weather condition plays a role in creating winds when it also changes?also changes?

A) humidityA) humidity

B) air pressureB) air pressure

C) cloud overC) cloud over

D) precipitationD) precipitation

What causes differences in air pressure?What causes differences in air pressure?

A) cloudsA) clouds

B) lightningB) lightning

C) pollutionC) pollution

D) temperatureD) temperature

A student observes the changes in the A student observes the changes in the pressure and temperature in a region, as pressure and temperature in a region, as shown in the table.shown in the table.

Time Pressure (millibar

)

Temperature (F)

9 a.m. 996 87

10 a.m.

992 88

11 a.m.

990 89

12 p.m.

985 92What is the most appropriate prediction about the approaching weather for this region?A)calmB)coldC)fairD)stormy

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)downB)leftC)rightD)up