What is the plate tectonic theory?
|A)||the belief that Earth's crust and upper mantle is broken into sections|
|B)||the belief that continents have moved slowly apart to their current locations on Earth|
|C)||the belief that hot, less dense material is forced up through Earth's crust through mid-ocean ridges|
|D)||the belief that Earth is broken into sections that fit together into one sphere|
What is the lithosphere?
|A)||the plates that make up the crust and the upper part of the mantle|
|B)||large, flat stones sitting on top of malleable magma|
|C)||the plates that make up the crust|
|D)||the upper part of the mantle|
How can Earth's plates move?
|A)||They only can move toward each other.|
|B)||They only converge or diverge.|
|C)||They only collide or slide along each other.|
|D)||They can collide, pull apart, or slide against each other.|
A divergent boundary is a boundary between two plates that __________.
|A)||move away from each other|
|C)||slide along each other|
|D)||move toward each other|
How can crust disappear at the edge of a boundary?
|A)||It is too dense and is sinking into Earth.|
|B)||because new crust is being added to the other edge of the boundary|
|C)||Gravity is pulling it down.|
|D)||The other edge of the boundary is being pulled into Earth's core.|
What happens to rock around a subducting slab?
|A)||It goes over the other plate.|
|B)||It goes under the other plate.|
|C)||It combines with the other rock.|
|D)||It disappears from Earth.|
Do two colliding continental plates always cause volcanoes?
|A)||No, earthquakes always occur when two continental plates collide.|
|B)||Yes, subduction always occurs when continental plates collide.|
|C)||No, usually no subduction occurs when continental plates collide.|
|D)||Yes, subduction always occurs when oceanic plates collide.|
What is a transform boundary?
|A)||A transform boundary is when two plates pull away from each other.|
|B)||A transform boundary is when two plates move toward each other.|
|C)||A transform boundary is when two plates collide.|
|D)||A transform boundary is when two plates slide past one another.|
What do scientists believe is the force behind the plate tectonics theory?
|B)||gravity slab pull|
|C)||the movement of the planets|
|D)||the Sun's gravity|
What does plate tectonics cause?
|B)||all of the above|
|C)||forms ocean basins|
What is the difference between normal faults and rift valleys?
|A)||Rift valley formation has nothing to do with normal faults.|
|B)||Rift valleys sometimes occur near normal faults, but their formation is not related to these faults.|
|C)||Normal faults occur in the northern hemisphere, but rift valleys only occur in the southern hemisphere.|
|D)||Rift valleys are formed from normal faults.|
What kind of movement created the Himalaya Mountains?
|D)||reversals of Earth's magnetic field|
What happens when an oceanic plate converges with a continental plate?
|A)||The less dense oceanic plate slides under the denser continental plate.|
|B)||The denser oceanic plate slides under the less dense continental plate.|
|C)||The denser oceanic plate slides on top of the less dense continental plate.|
|D)||The less dense oceanic plate slides past the denser continental plate.|
What are strike-slip faults?
|A)||a boundary where rocks move in the same directions at the same rate|
|B)||a boundary where rocks on the same side of the fault move in the same direction, but at different rates|
|C)||a boundary where rocks in the fault never move|
|D)||a boundary where rocks on opposite sides of the fault move in opposite or the same directions at different rates|