Plate Tectonics

Which layer of the Earth creates convection currents causing the crust to move?

The longest mountain ranges in the world are found in ......

The Earth is composed of layers. Which layer is solid and composed of mostly iron and nickel?

which type of forces shape the land's surface by building up mountains and other land masses?

Changes in the Earth's magnetic field creates magnetic ____ on the ocean floor.

Continental crust is composed mostly of ______.

In 1910, this scientist theorized that the continents had moved.

What type of plate boundary exists in the Mid-Atlantic Ridge?

Where pieces of Earth's crust diverge on land, a deep valley called a _____ valley forms.

A compass needle in the northern hemisphere will point to....

Hawaii is an example of

Which of the following is not the name for one of Earth's plates?

Select the densest type of Earth's Crust.

What type of plate boundary would exist in this diagram?

Alfred Wegener called the supercontinent.....

Which type of wave is used to determine the structure of Earth?

The formation of the Grand Canyon by the Colorado River is an example of.....?

Which of the following is not evidence of sea-floor spreading?

the most outer layer of the Earth.

Know for his discovery of seafloor spreading

Which type of material is the thickest part of the Earth's crust composed of?

The layer that is below the plates and made of plastic like molten rock

Near which letter would you find magnetic stripes?

Seismic wave that moves in a push pull motion

What has happened to the Earth's magnetic field over millions of years?

The seismic wave that causes the most damage

About ______ years ago, the continents were joined together in one supercontinent.

How much of the Earth's crust is composed of silicon and oxygen?

What is the name of a rock that has undergone heat and pressure

The theory that the continents are moving is called.....

The theory of _____ ______  states that the Earth's plates are in slow constant motion.

Which letter would represent a deep ocean trench?

Earth's plates slip past each other at ______ boundaries.

Which is a source of evidence for the structure of the Earth?

Heat from the ______ creates convection currents in the ______.

Deep scratches caused by _____ have been found in rocks of South Africa. 

The Earth is composed of layers. What is the outermost layer of Earth called?

volcanoes form this type of rock.

What type of organism was the fossil Mesosaurus?

It takes 100,000 years for a plate to move 2 Km. What is the rate in centimeters per year?

Wegener thought that the coastlines of Africa and  _______ seemed to match up.

Seismic wave that moves at right degree angles

Scientists used a small submarine named ____ to explore the ocean floor.

Select the correct order of events in the formation of sedimentary rock.

In a process taking tens of millions of years, part of the ocean floor sinks back into the __-.

The point below the Earth's surface know as the start of an earthquake

Most geologists originally ______ Wegeners idea of continental drift.

The San Andreas Fault is an example of which type of plate boundary?

A chain of mountains that runs along the middle of the ocean floor.

Earth's plates move apart at ______ boundaries.

The Earth is composed of layers. What layer creates the magnetic field of the Earth?

A large landmass is called .....

Which of the following is not produced by a convergent plate boundary?

Earth's plates move together at _____ boundaries.

The process of  _____ allows ocean floor to sink back into the mantle.

In the mid-1900's scientists mapped the ocean floor using......

_________ currents in the Earth's mantle cause plates to move along _____ .

Which layer has the rigid plates?

Glossopteris fossils have been found in Africa, South America, Australia, India and.....

This process adds more crust to the ocean floor.