Warm, less dense magma __________ in the mantle.

What is the name of the fossil found on both sides of the South Atlantic Ocean?

What do we call it when magnetic north changes places with magnetic south?

Which layer does convections occur?

What was the name of the supercontinents in the theory of continental drift?

Why was Wegener's theory not accepted when he proposed it?

What is the Glossopteris?

Which mechanism for plate movement is the most important?

Cooler, more dense magma ________ in the mantle.

What is the process of adding new crust at a mid-ocean ridge?

Which plate boundary is where crust is destroyed?

Which type of convergent plate boundary do volcanoes occur?

Which plate boundary is new crust added?

At which plate boundary does subduction occur?

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

What type of convergent plate boundary produces mountains?

Where do mid-ocean ridges form?

What is a large slab of earth's crust and rigid upper mantle called?

Which plate boundary do plates slide past each other horizontally?

What type of convergent plate boundary do the deepest trenches occur?

What theory states that the continents were once part of one large landmass, that over time broke into pieces and drifted apart?

Which plate boundary is crust NOT created or destroyed?

What mechanism causes older crust to be moved away from the mid-ocean ridge?

What process occurs in the mantle where heat energy is moved from an area of low density to an area of high density?

What process is pulling older, more dense oceanic crust into the mantle?

What theory states that the Earth's crust and rigid upper mantle are broken into section called plates?

What plate boundary does seafloor spreading occur?

The San Andreas Fault is what type of plate boundary?

Where would you most likely have an earthquake, volcano, mountain building or trenches occur?

What type of evidence supports coal beds and fern trees on Antarctica?

In an oceanic, oceanic convergent plate boundary, which plate is the one that sink?

Why do continental, continental convergent plate boundaries buckle to form mountains?