Question 1

The ocean covers about how much of Earth’s surface?

Accepted Answer

70 percent

Question 2

Although the ocean is one continuous body of water, oceanographers have divided it into four principal areas:

Accepted Answer

The Pacific, Atlantic, Indian, and Arctic Oceans

Question 3

The ocean holds how much of Earth’s water supply?

Accepted Answer

About 97 percent

Question 4

How much of the ocean floor have humans mapped with modern sonar technology?

Accepted Answer

Less than 20 percent

Question 5

True or false: Scientists believe most species on Earth live in the ocean.

Accepted Answer

True

Earth's Oceans

2) Although the ocean is one continuous body of water, oceanographers have divided it into four principal areas: