Chapter 10 Quiz

What did Wegener think happens during continental drift?

• Continents move.

• Continents freeze.

• The mantle warms.

• Convection stops.

Wegener thought that all the continents were once joined together in a supercontinent that he called _________________.

• Pangaea.

• Gondwana.

• Laurasia.

• Atlantis.

The drawing shows North America and Africa. Which parts of the coastlines of the two continents were joined in Pangaea?

• The eastern coast of North America and the northwestern coast of Africa

• The western coast of North America and the northeastern coast of Africa

• The southern coast of North America and the southeastern coast of Africa

• The northern coast of North America and the southwestern coast of Africa

Wegener proposed that mountains form when continents collide, crumpling up their edges. Was Wegener’s idea about how mountains form consistent with his hypothesis of continental drift?

• Yes, because the collision and crumpling support the movement of continents.

• No, because mountain formation is unrelated to continental drift.

• Yes, because both involve tectonic plate movements.

• No, because Wegener's hypothesis only explains oceanic features.

Michelle is a scientist working in Antarctica. She learns that fossils of Glossopteris have been found on Antarctica. Her colleague Joe, working in India, has also found Glossopteris fossils. What theory explains how these fossils could be found in both places?

• Theory of Evolution

• Continental Drift

• Big Bang Theory

• Plate Tectonics

In which areas does subduction of the ocean floor take place?

• rift valleys

• the lower mantle

• mid-ocean ridges

• deep-ocean trenches

A mid-ocean ridge is a ________________ that rises up from the ocean floor.

• mountain range.

• valley.

• plateau.

• trench.

Compare and Contrast Look at the diagram. Label the area where new crust forms.

• Mid-ocean ridge

• Subduction zone

• Transform fault

• Trench

The oldest parts of the ocean floor are no older than about 200 million years because:

• the ocean floor is constantly being recycled through the process of plate tectonics.

• the ocean floor is protected from erosion and weathering.

• the ocean floor is made up of very stable and durable rocks.

• the ocean floor is younger than the continents.

Place the following steps of sea-floor spreading in their correct sequence.

• B

• The molten material cools and hardens, forming a strip of rock along the ocean floor.

• A

• The strip of rock moves away from the ridge.

• C

• Molten material from inside Earth rises to the ocean floor at a mid-ocean ridge.