Plate Tectonics - Quiz

What are the two types of crust on the earth's surface?

• A. continental and silicon

• B. transform and oceanic

• C. oceanic and continental

• D. divergent and convergent

What does the author compare the earth's surface to?

• dinner plates

• a massive puzzle

• the ocean

• an earthquake

Crustal movements can be dangerous to humans.

• What evidence from the text supports this conclusion?

• A) Plate movement at transform boundaries can sometimes cause earthquakes, some quite large and devastating.

• B) Plate movement at convergent boundaries can result in the formation of mountain ranges like the Himalayas.

• C) The spreading rate of some continents can reach 120 millimeters per year.

• D) As solid as the earth may seem, there are always parts of its crust moving at incredibly slow rates.

Crustal movements in one location can affect locations far away.

What evidence from the text supports this conclusion?

• A. Steady advancement in technology has allowed geologists to better understand plate tectonics.

• B. The mantle is made up of elements like oxygen, silicon, and magnesium.

• C. Geologists mapped the ocean floor and discovered the mid-oceanic ridge.

• D. Divergent boundaries in the ocean create a chain reaction that pulls plates apart on land.

What is the main idea of this text?

• A. Pangaea was a "super-continent" that existed about 300 million years ago.

• B. Plate tectonics cause the earth's surface to shift and change in various ways.

• C. Scientists discovered similar fossil types and rock types on different continents.

• D. Crustal movements create convergent, divergent, and transform boundaries.

Read this sentence from the text

"As you can guess, the oceanic crust is composed of the pieces that cover the ocean floor, and the continental crust forms our continents."

As used in the text, what does the word "composed" mean?

• A. studied

• B. divided

• C. made up

• D. shifted

Choose the answer that best completes the sentence.

The continents are slowly but constantly changing in location. ________, the continents used to form a single landmass called Pangaea but gradually drifted apart.

• A. For example

• B. Currently

• C. Including

• D. Above all