Wednesday 11/29/17 Notebook Entry: Think about last night’s reading assignment (pgs. 80-81). How might the discovery of mid-ocean ridges support Alfred Wegener’s hypothesis of continental drift? Example of mid-ocean ridge *****Last day to turn in corrections of Convection Current Lab CER *****Turn in the supercontinent writing prompt from yesterday if you took it to finish for homework.

There was other evidence later on that helps us to understand how the continents fit together. We’ll be looking at some of that evidence today. Notice on the map the fossil evidence. Also notice the other evidence.

Folded Mountains with Matching rocks Two other types of evidence that we now have to support Wegener’s theory of continental drift, including: Folded mountains- where two plates are crushed together, causing the rock to bend. We see the continuation of this range on both south america and africa. Glacial deposits- Does it surprise you to know that there was once a glacier in the middle of what we call Africa? Or one covering Australia? After glaciers are gone from an area, they leave behind signs that they were there, like these glacial deposits. We can find glacial deposits on certain parts of the world, telling us these areas were once much colder and covered by large glaciers. Pass out map Glacial Deposits

On our maps, we’re going to draw and label where the folded mountains and the glaciers are. On our map, it doesn’t show much, right? It just makes these two things look really unrelated. However, look at your map in your notebook. If you drew these on that map, would they be next to each other, just like the fossils? Glue the other map over the top, like a flap.

Glue your world map into your science notebook by ONLY gluing the top two corners to it lifts like a flap over your supercontinent. 5 minutes

Continental Drift Animation Alfred Wegener Song!

T = Continental Drift Evidence Lines of Evidence 2-Column Notes T = Continental Drift Evidence Fossil evidence Fossils of the same plants and animals were found on South America, Africa, India, Antarctica & Australia. These plants and animals could not have traveled across the oceans.

T = Continental Drift Evidence There are matching folded mountains along the coast of ________ Matching folded rock must be formed at the same time & place. Landform Evidence

T = Continental Drift Evidence There are glacial deposits of rock and sediment on _____________. Some of the plant fossils do not match the current climate of the continent. Climate Evidence

Challenge to Wegener's Hypothesis Poor explanation for the force that pushes or pulls the continents and causes them to move.

What other evidence could support Wegener’s idea The ocean floor gives us many clues…how did we find these clues? Marie Tharp’s Maps Mapping with Sonar

Scientists Build on Previous Ideas Harry Hess Geologist and Navy submarine commander during World War II In 1960 he proposed sea-floor spreading based on observations of the East Pacific Rise 3 min Hess was the first to propose that the seafloor is actually SPREADING apart, causing seafloor structures that support Wegener’s ideas about continental drift

East Pacific Rise

Homework Read and do pages 82-83