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Continental Drift Explained
1. 9/15/11
LEQ: HOW does continental drift happen?
(reminder: complete sentences!)
1. What is Pangaea?
2. What is the theory of continental drift?
3. What different types of evidence do we
have to support this theory?
4. Is it possible to find ice evidence in
Jamaica? Explain.
2. AGENDA:
• WORK TIME
• ACTIVATING STRATEGY
• NEW LEQ NOTES/MATERIAL
• DEMOS
• PRACTICE
3. Today’s LEQ: How does continental
drift happen?
By the end of today, you should be able to…
1. Explain the geologic conditions that allow
continents to move
2. Describe convection currents that cause the
continents to move
11. Key Point
• The movement of the food coloring represents
the movement of magma in the Earth’s mantle
• This movement is what causes Earth’s
continents to move away from each other
12. DEFINITION: DIAGRAM:
The cycle of magma under
the crust as it
heats, rises, cools, and
sinks
CONVECTIO
CAUSES: EFFECTS:
N
CURRENTS
14. HOT Q:
• How would the position of
the continents have been
different if the inner core was
made of a solid block of ice
and not hot iron?
a. The continents would still
be one mega continent,
Pangaea
b. The continents would be
the same position as they
are today
20. (THIS GOES UNDERNEATH YOUR FRAYER DIAGRAM)
LITHOSPHERE: the solid crust and the
rigid top layer of the mantle
ASTHENOSPHERE: the liquid, tar-like
layer below the lithosphere
TECTONIC PLATES:
23. (THIS GOES UNDERNEATH YOUR FRAYER DIAGRAM)
LITHOSPHERE: the solid crust and the
rigid top layer of the mantle
ASTHENOSPHERE: the liquid, tar-like
layer below the lithosphere
TECTONIC PLATES: huge slabs of the
lithosphere that move because of
convection currents
24.
25. DEFINITION: DIAGRAM:
The cycle of magma under
the crust as it
heats, rises, cools, and
sinks
CONVECTIO
CAUSES: EFFECTS:
N
Hotter core temperature
CURRENTS plates “drift”
Liquid asthenosphere Tectonic
Rigid lithosphere apart!
26. Steps of Convection Comics!!
1. Use the list at your desk to put the steps of
convection in order (the first one is done for
you)
2. Draw a comic strip for the four steps of
convection currents!
3. Your comic strip should include:
A) 4 boxes (1 for each step in the cycle)
B) 4 illustrations EXAMPLE:
C) the four steps of convection (you may copy
Liquid magma in the mantle is
heated by the earth’s core
the 4 steps exactly if you like, but you are
encouraged to be creative!)
(add illustration
here)
27. SUMMARIZER
• Watch the video again
• This preview is for a movie called
“Ice Age: Continental Drift”
• In 3 sentences or more, explain why the continents
ACTAULLY move—(hint—it is not because of a squirrel
running around…)
• YOU MUST USE EACH OF THE FOLLOWING VOCABULARY
FOCUS WORDS in your answer!!!
-Lithosphere
-Asthenosphere
-Convection Current(s)
-Tectonic plates
28. Let’s REVIEW: Earn your seat
• What is the name of the mega continent?
• Who proposed the theory of continental drift?
• What is the theory of continental drift?
• What are the 3 types of evidence that support this
theory?
• Why do the continents move apart?
• How do convection currents cause the plates to move?
• Why is it possible we could find fossils of tropical plants
in Alaska?
• How is it possible that similar animal fossils are found
on two separate continents?
Editor's Notes
Using the hot plates and glass plate from earlier, have sponge cut outs of the continents -can compare to a beaker with cold water with a sponge in it not moving
