Homework
 Atmosphere Review – front page
Learning Target
 I can describe how global winds are produced
 I can explain the Coriolis Effect and the
influence it has on global winds
 Take out ISN
Barometers
 Rapidly falling pressure almost
always means an approaching storm
system.
 Rapidly rising pressure almost
always means clearing and cooler
weather is ahead.
Global Winds Reading
 Independently complete the worksheet
1. Read through the warm up and answer the questions
as best as you can
2. Draw arrows on the globe in your prediction
3. Read and annotate the global wind patterns passage
Differences in Temperature & Air
Pressure
 Remember: uneven heating of the Earth creates
differences in air pressure.
 What do the differences in temperature and air
pressure create?
 Wind
 How do they create wind?
 Air wants to move from an area of high
pressure to an area of low pressure
Wind Direction
Sea & Land Breeze Convection Currents
Global Winds
 The uneven heating of the earth creating
differences in air pressure creates global winds.
 At the poles: indirect solar energy; cold temps;
high pressure
 air sinks and moves towards the equator.
 At the equator: direct solar energy; hotter than
the rest of the Earth; low pressure
 air rises and moves towards the poles.
 The circular movement is called a convection
current.
Global Winds
 Causes air from adjacent areas to move toward
the equator
 This movement begins a chain reaction of air
movement throughout Earth, creating 6 wind
belts.
 The circular movement is called a convection
current.
Complex Movement of Global Winds
 It’s not as simple as one global wind
convection current in each the northern &
southern hemisphere. WHY?
 Earth’s rotation affects wind direction.
 The influence of the Earth’s rotation on the
movement of air and water is called the
Coriolis Effect.
Coriolis Effect
 As Earth spins, anything moving in a straight
line from North to South will be deflected
sideways.
 In the Northern Hemisphere, winds,
water, and other fluids will
be deflected to the
right at a 90o angle or
clockwise

In the Southern
Hemisphere, everything
will be deflected to the left
at a 90o angle or
counterclockwise
Coriolis Effect
Coriolis Effect
 Coriolis Effect in Space:
Video 2
Try this flight simulator:
 http://www.montereyinstitute.org/noaa/lesson08/l8ex1.htm
Global
Wind Belts
& Calm
Regions
Your turn
 Page 60 in your ISN…
 1 minute write: Explain the Coriolis Effect in your own
words
 Work as a table to complete the chart
Check for Understanding
 Global Winds Drawing
 Place arrows on the globe to indicate the actual
movement of the winds based on the Coriolis Effect.
 How does this drawing differ from your prediction?
Exit Ticket
1. How does the Coriolis Effect influence the path of
projectiles or wind traveling through the atmosphere?
2. In which direction does the Coriolis Effect curve the
wind in the Northern Hemisphere? Southern?
3. Complete the diagrams by drawing curved arrows to
represent the path of the wind from high to low
pressure:
HIGH
LOW
HIGH
LOW
LOW
HIGH
LOW
HIGH
Northern
Hemisphere
Southern
Hemisphere
Southern
Hemisphere
Northern
Hemisphere