Plate Motion
What is the outermost layer of the Earth called?
Outer layer or crust
How do diverging plates move?
Away from each other.
How do converging plates move?
towards each other.
How do transform plates move?
They slide past each other.
What causes a wind-driven wave?
wind
Below the outer layer we have soft, solid rock. What do we call this layer of soft solid rock?
Rock was found at a divergent plate boundary and more rock was found miles away from the plate boundary. Which rock is younger, the one found at the plate boundary or the one found away from it?
Rock found at the plate boundary.
Do convergent plates crash with each other? Explain.
No, because plates move slowly toward each other over time.
What does a cross-section show?
It shows what the inside of something looks like.
What causes a tsunami?
An earthquake which causes a sudden shaking of the seafloor displacing large amounts of water.
What is a tectonic plate?
a section of the outer layer
Mesosaurus fossils were found in South America and Africa. Explain what happened.
Mesosaurus lived together and could not swim long distances. When the organisms died, their fossils were separated over millions of years by diverging plates.
When one plate sinks below another plate into the mantle, what do we call this process?
Subduction
True or false. Earthquakes cause plates to move.
False.
True or false. Wind-driven waves are usually more destructive compared to tsunami waves.
False.
What is a plate boundary?
It is the place where two or more plates meet.
What landform is associated with divergent plates?
Ridges such as a mid-ocean ridge.
What landform is associated with convergent plates?
Trench
True or false. Earthquakes happen all the time and we can feel them.
False. Earthquakes do happen all the time, but we do not always feel them.
Which plate motion is more likely to cause a Tsunami?
Convergent plate motion.
In which type of plate boundary do we find a pattern of earthquake and volcanic activity?
All: transform, divergent, and convergent.
As plates move away from each other, what happens at the plate boundary with the mantle?
Mantle (magma) rises and cools down at the edges of the plates adding new land.
Explain exactly what happens as plates converge into each other.
1. Name the plate movement
2. Name what happens to the plates
3. Explain how the plates interact with the mantle
Plates move toward each other. One plate sinks into the mantle where it gets broken down and becomes part of the mantle.
Sing the Plate Motion song.
Convergent is colliding
Divergent is dividing
Transform is sliding, plate boundaries
Where do earthquakes need to occur and at what magnitude in order to cause a tsunami?
In the ocean at a magnitude of 7 or greater.