Thursday, February 11th
DO NOW
Tell the layers of the Earth. Which part is made of plates?
Why do the plates move?
4
3
2
1
Density Lab Summary
Identify which of the four layers of Earth is
most dense? Least dense?
Explain how you know.
TODAY’S PLAN
•I can list the layers of Earth.
•I can explain movement of the crustal plates at
different types of plate boundaries.
•I can relate movement at plate boundaries to
features/events that occur at these boundaries.
•I can define Pangea and Continental Drift.
TODAYS DO
•We will complete a web quest about the structure
of Earth, plate boundaries, Plate Tectonics, and
Continental Drift on the Chromebooks.
DO NOW MONDAY
• What is Pangaea?
TODAY’S PLAN
•I can define Pangea and Continental Drift.
•I can explain evidence for Continental Drift.
•I can relate Continental Drift to Plate Tectonics.
TODAYS DO
•We will complete an activity with magazine
pieces.
•We will discuss Pangea and Continental Drift.
•We will complete a Continent Cut-Out Activity.
Essential Question:
Why do scientists believe that the continents
were once together in a supercontinent
called Pangaea?
Putting the pieces together:
Each group has been given a bag of
magazine pieces.
Piece them together the way you think they
fit. (You will only have 3 minutes.)
Think About It:
When you piecing together the magazine
pieces, how did you decide where to put
the different pieces?
Have the continents always been in
the position they are in now?
• In the autumn of 1911, Alfred Wegener
• a German scientist came across a
scientific paper that listed
• fossils of identical plants and animals
found on opposite sides of the Atlantic.
Hmm…
• Intrigued by this information, Wegener
began to look for, and find, more cases of
similar organisms separated by great
oceans.
• Wegener proposed that about 300 million
years ago, the continents had formed a
single mass, called Pangaea (from the
Greek for "all the Earth").
• Pangaea had rifted, or split, and its pieces
had been moving away from each other
ever since. This is called Continental Drift.
Three Pieces of Evidence:
1. Fossil—SAME plants and animals found
on different continents with totally
different climates
Three Pieces of Evidence:
2. Rock—same types of rock on different
continents; Shape of continents fit together
like puzzle pieces
Three Pieces of Evidence:
3. Ancient Glacier—grooves left in rock by
glacier reaching across different continents
Sea-Floor Spreading
• Where two ocean plates are diverging
(moving apart), molten magma erupts,
forming underwater mountains under the
ocean called the mid-ocean ridge.
• As the oceans plates move further and
further apart, new ocean floor is
continuously added. This is called seafloor spreading.
Other scientists did not support Wegener’s
theory of Continental Drift. Why not?
He could not give the reason why the
continents moved apart.
But we can today:
Convection Currents move the crustal plates
Plate Tectonics!!
Proof in Pieces:
1.Take the worksheet and cut out around
each of the continents. (Throw away the
tiny islands and oceans)
2.Now start constructing the pieces into one
supercontinent. (Hint: Think about how
you pieced together the magazine.)
3.Glue the pieces onto the construction
paper once you have all the pieces where
you think they belong.
Pangaea:
Exit Slip:
What two things did Alfred
Wegener propose?
DO NOW TUESDAY
• Discuss at least one piece of evidence for
Continental Drift.
TODAY’S PLAN
•I can demonstrate Mastery of Earth’s History
learning targets on a written exam.
•TODAYS DO
•We will review our study guide for our Earth’s
History Unit Exam.
•Exam will be tomorrow, Wednesday,
February 17th.
DO NOW WEDNESDAY
• Get out your study guide and review for
test.
TEST EXPECTATIONS
• Do your best.
• Do your own work.
• Finish the test within the class
period. (No staying after bell.)
• Remain quiet at all times.
• Finished?
– Turn your paper in to the side cart.
– Pick up a Science Magazine and READ.