Theory of Plate Tectonics (ch. 4)

Who was the scientist that developed the theory of Continental Drift?

The Earth's continents were once connected in one supercontinent called

A transform boundary is where the plates are

Which events occur at plate boundaries?

What did Wegner notice when looking at a map of the world?

A mid-ocean ridge is at what type of boundary?

What causes changes in the number, shape, and size of Earth’s plates?

What tool was used to map the Mid Ocean Ridge?

The San Andreas fault in California is which type of boundary?

Earth's Lithosphere is broken into 

New oceanic crust is less dense than old oceanic crust because it is

Plate tectonics, or the movement of pieces of Earth's crust, is thought to be caused by

Where does molten material rise from the mantle during sea-floor spreading?

Any trace of an ancient organism that has been preserved in rock is called a

Where does subduction occur?

Mountain ranges form at which type of boundary?

Why was Alfred Wegener's theory originally rejected by scientific peers?

Which convergent boundary creates the highest mountain ranges?

A convergent boundary is where the plates are

A divergent boundary is where the plates are

Magnetic stripes near mid-ocean ridges are evidence for sea-floor spreading because

When divergent boundaries spread on land they form what?

The continents are moving away from each other as magma rises from mid-ocean ridges. This is?

Which type of evidence is Wegner NOT use to support his theory of Continental Drift?

The theory that pieces of Earth’s lithosphere are in a slow constant motion is