Mariana Trench Quiz

The passage says that if Mount Everest were placed in the Challenger Deep, its peak would be underwater. What does peak mean?

• top

• size

• shape

• weight

Why do U.S. naval submarines use the Mariana Trench as an expressway?

• The water at the bottom of the trench is clearer.

• It is more difficult for enemies to detect them there.

• The area provides a safe space away from harmful forces of nature.

• The navy has mapped the entire trench and is familiar with the entire area.

The Challenger Deep is the deepest point in the Mariana Trench. How did the Challenger Deep get its name?

• It was named after the British Royal Navy ship sent to measure the ocean depths.

• Its name comes from a machine whose weights extend to the bottom of the ocean.

• Its name is related to a type of echo sounder that sends sound waves to the seafloor.

• It was named after the scientists who discovered that water near the Mariana Islands was very deep.

Which point is best supported by the information about anglerfish and flashlight fish?

• Special instruments allow humans to study the deep sea.

• Humans cannot live in the rough conditions in the deep sea.

• Some animals have skills that help them live in the deep sea.

• Scientists are just beginning to understand animals in the deep sea.

What is happening at the bottom of the Mariana Trench?

• The Puerto Rico Trench is being created.

• The bottom of the Mariana Trench is moving up, toward the surface.

• A layer of puttylike rock is moving between a heavy plate and a lighter plate.

• A heavy plate of rock is pressing into a lighter plate of rock, causing the heavy plate to move down.