Exploring the Ocean

Question 1

Which statement best describes what scientists currently know about the deep ocean?

Accepted Answer

Only a tiny portion of the deep ocean has been studied; most of it is still unexplored.

Answer

Scientists have fully explored the deep ocean, so we know every species that lives there.

Answer

Exploration of the deep ocean is complete because pressure no longer challenges researchers.

Answer

The deep ocean has been mapped in detail using satellites, so no unknown areas remain.

Question 2

Which two of the following are tools that scientists use to explore the ocean?

Accepted Answer

Submarines and remotely operated vehicles (ROVs)

Answer

Scuba gear and fishing nets

Answer

Satellites and fishing rods

Answer

Sonar and telescopes

Question 3

Jordan reads that scientists have directly studied only about 8% of the deep‑sea floor. Which sentence correctly tells what this means?

Accepted Answer

Only a tiny part of the deep‑sea floor has been explored.

Answer

Scientists have visited almost all of the deep‑sea floor.

Answer

Scientists have explored half of the deep‑sea floor.

Answer

The deep‑sea floor is completely mapped.

Try three questions