Download Wind Chapter 15 section 3

National Geographic Article: Winds
by Jimmy, Joachim, Kimberlee, Mitchell, and Cyrus
6 errors in paragraph
one
Jimmy wrote an article for National Geographic about the wind. He wrote that wind is caused by
similarities in air pressure. These differences in air pressure are caused by the unequal heating of the
Earth’s surface. The equator receives more direct sunlight than other latitudes, so air is warmer and more
dense. This warm, less dense air sinks and creates an area of low pressure. This warm, rising air flows
towards the equator. The air at the poles is warmer and more dense, so it sinks. As the cold air sinks, it
creates an area of high pressure. The cold air then flows to the equator. Jimmy connected wind movement
to being very similar to deep ocean tides. Joachim then drew a picture for Jimmy’s article explaining wind
movement.
High Pressure, Warm, More Dense
2 errors in
diagram
labels
Low Pressure, Warm, More Dense
High Pressure, Cold, More Dense
4 errors in next paragraph
Mitchell was working with Jimmy and Joachim on the article about wind. He told Jimmy that wind traveled
in one big, trianguular pattern from the equator to the poles. However, Kimberlee told him wind traveled in
connection cells, separated by pressure belts every 45o latitude. The pressure belts are created because the
air heats up and sinks at 30o North and South latitude. This air goes to the equator and repeats the cycle. At
the poles, the cold air sinks heading to the equator, but then warms at about 60o North and South latitude,
rising and returning to the pole. Joachim wants to add the convection cells to his diagram. Draw the hot air
in red arrows and the cold air in blue arrows. You should have a convection cell drawn at each 30o latitude.
Cyrus added a data table to the article and diagram. He filled in some blanks, but could not get all of
the information. Please help him fill in the numbered blanks.
Name of Global Wind
Polar Easterlies
Location of Wind
13
Direction Wind Blows
14
Weather Created
Snow and Freezing
Weather
16
15
Trade Winds
Between 30o and 60o
latitude
17
Toward the poles west
to east
18
Doldrums
19
Not much wind
X
20
At 30o north and south
latitude
X
Weak winds, very dry
air, deserts located here
X
On the diagram on the previous page, add yellow arrows for the polar easterlies, purple arrows for the
prevailing westerlies, the black arrows are the trade winds, highlight the horse latitudes green, and highlight
the area of the doldrums orange.