Plate Motion 1
How did the Mesosaurus Fossils end up on two different continents?
They are part of two different plate boundaries that were once together, that moved apart slowly.
What is Mantle?
the layer of soft, solid rock underneath Earth's plates
Earth's crust is divided into sections called
Plates
What causes Earthquakes?
Plates moving
What are the Mesosaurus?
Ancient fossil remains of a crocodile like reptile.
Which statement best describes what Earth’s outer layer is like underneath the surface in the image?
What is
What is Earth's outer made up of? What another name for it?
Hard-solid rock; Crust
True/False
Underneath both the soil and the ocean, Earth’s outer layer is made of sand and water.
False
What do you call a plate boundary that is moving closer together
Convergent
What is a cross section?
Looking at the side view of a diagram.
How long does it take plate to move hundreds of miles apart?
Millions of years
What do you call a plate boundary that is moving apart?
Divergent
What is Earth's outer layer made of?
Hard, Solid Rock
What is a trench?
a long, deep indentation in the ocean floor formed when two plates move together
What type of map shows the patterns of ancient land and water based on rocks and fossils?
Paleogeographic map
At what rate do plates move each year on average?
3 cm
Explain what happened with the mantle between two plates as they move away from each other?
Soft, solid rock from underneath the plates rose and hardened, adding solid rock to the edges of both plates. Mid-ocean ridge
What is a mid-ocean ridge
an underwater mountain range formed when two plates move apart at divergent plate boundaries
Pangea
What is a Plate
one of the very large sections of hard, solid rock that make up Earth’s outer layer
When two plates move towards each other, does one plate sink into the ocean or into the mantle, which is soft solid rock
Sinks into the mantle
A team of geologists wants to study hard, solid rock under the surface of Earth. The team is considering drilling down in Saudi Arabia (on land) or in the Arabian Sea (on water). Where will the geologists find hard, solid rock?
Both Saudi Arabia and Arabian Sea
In the past, Africa used to be farther away from Europe than it is now. What could explain why Africa is closer to Europe now than it was before?
Africa and Europe are parts of different plates. The plates slowly moved toward each other as one plate went under the other plate into soft, solid rock over millions of years.
When they were living, all the Lystrosaurus lived together on land, and they could not swim. However, now there is an ocean between the Lystrosaurus fossils. What could explain how these fossils got so far apart?
Divergent plate boundary
Dr. Patel and her team have been using GPS to track two plates that are moving toward each other. Which diagram shows what is happening at the place where the plates are moving toward each other?
One plate is going underneath the other plate and sinking into the soft rock below creating a trench