Plate Tectonics

What happens to the sea floor as you move away from the mid-ocean ridge?

The grey stripes show a normal magnetic pattern, what do the white stripes represent?

At which plate boundaries do subduction zones occur?

Which type of plate boundaries grind past each other?

Because of convection, which way will the plates move in the middle of this picture?

Who proposed the theory of continental drift?

What device do scientists use to map the magnetic field of the ocean floor?

True or false: Earth's magnetic field has gone through many reversals over time

Why wasn't Alfred Wegener's theory of continental drift accepted in his time?

At which plate boundaries do Earthquakes occur?

Which type of plate boundary is shown in the picture?

At which type of plate boundary do we find seafloor spreading?

Oceanic Crust can be up to 180 million years old, while continental crust can be up to:

The Pacific Ring of Fire is where plates are mostly _____

Which type of boundary is shown in the picture?

As shown in this isochron map, what pattern do we notice about the oceanic crust between Africa and South America?

What is it called when one plate gets pulled underneath another plate?

Which type of plate boundaries form deep ocean trenches?

Which type of boundaries produce the greatest number of earthquakes? Caused by a plate subducting.

Which piece of evidence was NOT used by Alfred Wegener?

What is the energy source that drives plate tectonics?

At which plate boundary do volcano mountain ranges occur? Ex - Andes in South America

Where do rift valleys form?

There is a chain of island volcanoes off the coast of Alaska. What type of boundary created this island chain?