Section 1
Plant fossils of the same kind of plants were found on several continents that should have been tropical climates
TRUE or FALSE
TRUE
The sinking of ocean crust back into the mantle is known as what?
How would you describe the formation of a volcano?
What do mid ocean ridges cause?
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)
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
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
The ocean crust is dense and under water
TRUE or FALSE
TRUE
What does the magnitude of an earthquake measure?
The continental crust is lighter than the oceanic crust and thicker
TRUE or FALSE
TRUE
What determines how the plates interact at their boundaries?
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)
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)