Plate Tectonics

These are formed along the edges of plate boundaries.

What causes the movement tectonic plates?

What is true of sea floor spreading?

Two _________ boundaries move toward one another.

Continents used to be joined together as a supercontinent called what?

What technology was used to map the ocean floor and find the mid-ocean ridges?

A mid-ocean ridge is a long chain of mountains in the middle of the ocean.

What does a divergent boundary form as it moves apart?

Which process or processes change the size and shape of the oceans?

This is the process of the mantle building up new oceanic crust on the ocean floor.

This man thought that the continents moved across the surface of the Earth.

Some evidence for continental drift was the fit of the continents and __________

Plates that move past one another are called a ____________ boundary

Alfred Wegener's idea was called the theory of:

The process of one plate falling beneath another plate is called what?

A fossil that Wegener found across multiple continents was of the ____________.