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Plate Boundaries
Types of Plate Boundaries
Question | Answer |
---|---|
New oceanic crust forms at what type of boundary? | Divergent |
At which plate boundary do plates move towards each other? | Convergent |
Continental crust is thicker than oceanic crust: true or false? | True |
Oceanic crust is more dense than continental crust: true or false? | True |
When two tectonic plates slide past one another, the boundary between them is called... | Transform |
Within convection currents, cold areas move ___ and hot areas move ___. | Down, Up |
The Mid-Atlantic Ridge occurs at what type of boundary? | Divergent |
The Andes Mountains occur at what type of boundary? | Convergent (Oceanic-Continental) |
What geologic feature occurs at transform boundary? | San Andreas Fault |
What geologic feature occurs at a convergent boundary (continental-continental) | Himalayas |
When an oceanic plate and a continental plate collide, what happens to the oceanic plate? | It goes under the continental |
The formation of the Hawaiian islands is associated with what type of boundary? | Hotspots |
Subduction zones are associated with what type of plate boundary? | Convergent |
The Aleutian Islands occur at what type of boundary? | Convergent (Oceanic-Oceanic) |
When an oceanic and continental plate converge, what happens? | Oceanic subducts under the continental, melting the crust, forming volcanic mountains |
When two oceanic plates converge, what happens? | The older plate subducts under the younger one, melting the crust, forming volcanic islands |
When two continental plates converge, what happens? | Continental plates are too light to be subducted, therefore they buckle and get pushed up to form mountains |
Where does the energy that causes the plates to move come from? | The Earth's internal heat |
Why does oceanic crust subduct under continental crust? | Because it is more dense |