Plate Tectonics Flashcards
What type of boundaries move towards each other
Convergent boundaries
What type of boundaries move away from each other
Divergent boundaries
What type of boundaries slide against each other
Transform boundaries
Molten rock is called
Magma
Transform boundaries make
earthquakes
Rocks rising up and down in the mantle
Convection current
Magma forced to the surface of earth
A volcano
What do you call a plate of a lower density sliding under the other
A subduction zone
What forms trenches
Subduction
What makes a subduction zone
Two plates with different density colliding
Where does the convection current live
The mantle
What do divergent boundaries make
A rift, and new crust
What do convergent boundaries make
Mountain ranges
Is the mantle solid?
NO! The Mantle is not sold
What is the Lithosphere
It is the crust and the upper Mantle
What forms when a oceanic and a continental plate converge
Becomes granite.
What forms when oceanic crust diverges
mid ocean ridge
Why is the ring of fire an area in the Pacific, where many earthquakes and volcanos happen
there are numerous tectonic plate boundaries along the edges
How do earths tectonic (LIthosphere) plates move
convection current
New crust is formed in the ocean at mid-ocean ridges. What does this do to the older rocks
Pushes older rocks to the side that causing seafloor spreading
What evidence did Wegener find to support his theory of Continental Drift
matching ice sheets in Africa, Antarctica, SA, and Australia
Why did other sciences not support Wegener’s theory of Continental drift.
he could not explain how the plates moved
