Theory of Plate Tectonics — Unit test Answers

The _______________ contains the asthenosphere and the lower mantle. a. mantle c. crust b. core d. none of the above Please select the best answer from the choices provided

Bands of magnetic material in the sea floor that have opposite poles, or exhibit magnetic reversal, can provide evidence for sea floor spreading.

The mantle in the Earth continually heats up and cools down using convection currents.

What is the major evidence that sea-floor spreading creates new lithosphere? Explain your answer.

What can geologists learn about the interior of Earth from rock samples?

What causes the convection currents in the mantle?

Give an example of each of the types of heat transfer.

Explain how a mid-ocean ridge is formed.

Use the diagram to answer each question.

How do fossils help prove that the continents move?

Compare and contrast the outer core and the inner core.

What are the three main classes of rock?

In which layers of Earth do convection currents occur?

List the evidence that Wegener used to support continental drift.