8th Grade Plate Tectonics Review for EOI in Oklahoma

Convergent boundaries create

What force is great enough to move the big heavy land plates?

On land, divergent boundaries form

Mid ocean ridges continually add new material to the ocean floor in a process called

The kind of stress that squeezes the rock until it fold or breaks is

Where old lava rocks are subducted down into the mantle, deep places called ______ form.

When the old lava rocks make it to the edge of the ocean, it sinks back down into the mantle.

The process of subduction and sea-floor spreading change the size and shape of the oceans.

At the ridges, new ocean floor is added by

New lava from the mid-ocean ridges pushes old lava rocks toward the edges of the ocean.

What type of fault is this?

If plates come together, they are called

Earth's plates meet at

Anticlines and synclines are caused by

The movements of the plates, though very slow, over time has

stress that pushes rock in opposite directions

Who was Alfred Wegener?

Another form of evidence was fossils, why?

An example of a transform boundary is the

This also produces mountains called

What type of fold is this?

What type of fault is this?

If plates move apart they are called

When all the continents were joined together in the past, they were known as

What type of fold is this?

What type of fault is this?

The three kinds of stress that change the shape and volume of rock over millions of years are

The pieces of Earth's crust that "float" atop the mantle are called

The kinds of stress that pulls the rock apart, thinning it in the middle is

Tension stress pulls the crust apart, forming

Plates that slide past each other horizontally are

Breaks in Earth's crust are known as

A force that acts on rock to change its shape or volume is

Long chains of mountains in the ocean are

What was the first evidence Wegener used for his hypothesis of continental drift?

In the ocean, divergent boundaries form