Plate tectonics Review

Define divergent boundary.

(also called spreading centers) are the place where 2 plates move apart

How were the Hawaiian islands formed?

A hot spot

Define continental rift-

A long narrow fissure in the earth.

Which boundary type adds to the lithosphere (the hard outer crust of the Earth)?

B. Divergent

Why do some continental coast lines appear to fit like puzzle pieces?

Because of pangea

Which type of plate boundary led to the creation of the Himalayan Mountains, the highest in the world, near India?

C. Collisional

Define ridge-push

Causes oceanic lithosphere to slide down the side of oceanic ridge under the pull of gravity

What type of boundary destroys lithosphere?

Convergent boundary

What type of boundary formed the Himalayas Mountains?

Convergent continental-continental boundaries

In what way does a transform boundary differ from the other boundary types?

D. At a transform boundary, the plates move in a direction that is parallel to the boundary line.

What type of boundary creates new lithosphere?

Divergent boundary

Define convergent boundary

From where 2 plates move together

Name the oldest Hawaiian island

Kauai

Define slab-pull.

Mechanism that contributes to plate motion in which cool once oceanic crust sinks into the mantle.

Define subduction zone

Occurs when are oceanic plate is forced down into the mantle beneath a 2nd plate.

What type of boundary formed the Andes Mountains?

Oceanic-Continental convergent boundary

Define convective flow.

The motion of matter resulting from changes in temp.

In what way are transform boundaries different from the other boundary types?

They slide past each other

There were times in the Earth's history when the magnetic poles were reversed.

True

Who came up with the theory of continental drift?

Wegner

Define collision boundary

When 2 plates collide

Explain how the Earth recycles the lithosphere.

When the divergent forms land & convergent erodes land

What type of boundary leads to above ground volcanoes?

Oceanic-convergent convergent boundaries.

Name Wegener's supercontinent and how long ago it broke apart.

Pangea. 200 million years ago

Which type of plate boundary would be most likely to lead to above-ground volcanic activity?

A. Subduction

What kind of boundary is shown in the image below?

B. Divergent

Give 3 examples the support continental drift

Matching fossils, rock type structures, ancient climates