Plate Tectonics

The movement of Earth's crust results in:

• earthquakes
• volcanoes
• the formation of mountains
• tornadoes
• hurricanes

Which of these provide evidence that supports the theory of plate tectonics:

• earthquakes

• volcanoes

• mountains

• tornadoes

• hurricanes

The modern scientific theory which describes the movement of the Earth's outer layer is called:

The uppermost mantle and overlying crust, which behave as a strong rigid layer, are known as the:

Where is the lithosphere the thinnest?

• the oceans
• below portions of the continents
• it is the same thickness throughout
• where continents collide

Where is the lithosphere the thickest?

• the oceans
• the continents

• it is the same thickness throughout
• where it contacts the asthenosphere

The hotter, weaker layer in the upper mantle is known as the:

The Earth's lithosphere is broken into numerous segments called:

Identify the North American Plate:

Identify the South American Plate: