Chapter 19 Reading Guide
The Atmosphere in Motion
19.1: Air Pressure and Wind
Air Pressure
Temperature
Elevation
Increasing Elevation leads
to decreasing air pressure
Decreasing temperature
leads to increasing air
pressure
Humidity
Increasing humidity leads to
decreasing air pressure
1. Define air pressure. Then describe the likely weather in both high and low-pressure
conditions.
Air pressure:
In high-pressure conditions:
In low-pressure conditions:
2. Name and describe a way to measure air pressure.
19.2: Factors Affecting Winds
List the ways that the Coriolis effect and friction affect wind.
Coriolis Effect
Friction
Lessens impact of Coriolis effect, allowing
winds to blow on truer course
Greater effect over flat land than hilly land
Greatest effect over the ocean
Effect on winds decreases with elevation
1. Define the jet stream and explain the effect friction has on it.
19.3: Global Wind Patterns
1.Explain how warm and cool air circulate through the cells of the three-celled circulation
model. Discuss how the Coriolis effect changes the direction of the air as it circulates.
Global wind patterns create somewhat predictable conditions at different places on Earth.
List the likely conditions in each latitude zone.
Air Temperature
Hot
Little wind, westerly
Low
3. 60 - 90
4. 90
Surface wind
direction and
strength
Low
1. 0 - 30
2. 30- 60
Air Pressure
Coldest
Steady wind,
easterly
19.4 Continental and Local Winds
Under each label, describe the change of direction and temperature of the air as time
passes.
Sea Breeze Circulation
Land-Breeze Circulation
Describe monsoon winds and explain how the effects of both the seasons and the
continents combine to create these winds.