Final Review: Plate Tectonics

Section 1

100

Plant fossils of the same kind of plants were found on several continents that should have been tropical climates 

TRUE or FALSE

TRUE

200

What do mid ocean ridges cause?

Mid ocean ridges causes spreading in the ocean floor as the magma from inside comes up and cools down. 

300

How do convection currents drive the motion of Earth's rotation? 

Hot melted rock rises and cooler rock sinks in the mantle forming currents that move the plates 

400

The continental crust is lighter than the oceanic crust and thicker 

TRUE or FALSE

TRUE

500

At a convergent boundary water may be trapped and may mix with the material in the mantle. What occurs if this material reaches the surface before cooling? (The magma) 

A volcano 

Section 2

100

The sinking of ocean crust back into the mantle is known as what?

Subduction 

200

Subduction is the sinking of ocean crust into the mantle, where does this occur? (Think of an ocean floor feature) 

ocean trenches (basically holes in the ocean floor) 

300

The ocean crust is dense and under water

TRUE or FALSE 

TRUE 

400

What determines how the plates interact at their boundaries? 

The kind of boundary and the directions in which the plates are moving 

500

High silica magma will become more sticky and not flow as easily, due to this, it is more likely to produce a _______

A lava plateau (the lava would be slow moving) 

Section 3

100

How would you describe the formation of a volcano? 

Over time plate tectonics would push land up to the surface, and the magma below the surface will seep up. 

200

The movement of Earth's tectonic plates generates tremendous force. Which force is pulls on Earth's crust, STRETCHING the rock to make it THINNER? 

Tension 

300

What does the magnitude of an earthquake measure? 

The size of the earthquake's seismic waves