Thursday, February 11 th DO NOW Tell the layers of the Earth. Which part is made of plates? Why do the plates move?

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 sea- floor 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 17 th.

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.