This book belongs to:
Ms. Ashmead
Mississippi State Objective:
4c. Describe the causes and effects of heat transfer as it
relates to the circulation of ocean currents, atmospheric
movement, and global wind patterns (e.g., trade winds and
the jet stream). Provide examples of how these global
patterns can affect local weather.
Bell Ringer
1. Remember your assigned letter and find the desk
that matches your letter.
2. Leave your belongings at your desk and form a line
by the globe.
3. Pick up a piece of chalk and follow Ms. Ashmead’s
4. Write what you have just learned in the 3rd box on
page 1 of your book.
Global Wind Patterns
Global Wind Patterns
• Trade Winds flow
through the tropics.
They steer tropical
storms in the ocean.
• Westerlies move air
masses and fronts.
Group Activity!
Pretend that the “Yellow
Crime Tape” at your desk
is the equator and the
bubbles represent wind.
1. Trade winds blow
toward the equator.
2. Westerlies blow away
from the equator.
3. Polar winds blow
toward the equator.
Jet Stream and Local Weather
• Jet Streams are fast flowing
and narrow atmospheric
• A Jet Stream can significantly
impact our climate.
– The Dust Bowl in the 1930’s was
a long drought caused by a
weak Jet Stream.
• Dust bowl video/jet stream weatherman
Group Observations:
• Without opening the bottle, look at the patterns that can
form when you move the bottle. What do you see?
Discuss your observations with your group. Write down
your observations.
Ocean Surface Currents
• Surface currents affect water
to a depth of several
hundred meters.
• Following Earth’s major wind
patterns, surface currents
move in circular patterns in
the five major oceans.
Global Heat Transfer
• Surface currents affect climate by
moving cold and warm water
around the globe.
• A surface current warms or cools
the air above it.
• Winds pick up moisture as they
move surface currents.
Group Observations!
• Pretend that the fan represents wind and the
blue streamers represent ocean current. With
your group answer the following questions after
you have turned the fan on:
1) Does the current move by the wind?
2) If so, does the current move in the same
direction as the wind?
3) If the wind changes direction[turn the fan to a
different direction] what happens to the current?
Gulf Stream and Climate
• The Gulf Stream is the largest and most
powerful current in the North Atlantic
Ocean and is moved by Westerlies.
• The Gulf Stream (30 km wide and 300 m
deep) carries 100 times more water than
the Mississippi River.
• The Gulf Stream and North Atlantic Drift
cause coastal areas to have temperate
climates (little change in temperatures).
Gulf Stream
Match the Ocean Surface Currents
North Atlantic Drift
North Equatorial Current
Gulf Stream
Canary Current
2. ______________________________________
3. ______________________________________
4. ______________________________________
Match the Ocean Surface Currents
1. Gulf Stream
2. North Atlantic Drift
3. Canary Current
4. North Equatorial Current
Class Discussion!
• In your group, discuss which winds Christopher
Columbus used to sail to the New World in 1492.
What winds did his ship use to sail back?
Exit Ticket: Explain three things that you have learned in this class in the past two days.