Sailors thought the ocean was a frightening place, full of dangerous creatures。

• rocks
• mysteries
• animals
• chemicals

Early diving suits allowed people to descend fifteen meters underwater.

• explore
• go down
• live
• communicate

Scientists discovered underwater mountains and more than 4,000 new species.

• rocks
• volcanoes
• useful minerals
• animal types

More than 50 percent of the Earth is under water.

• True
• FALSE
• NO INFORMATION

Early sailors were afraid to explore below the surface of the ocean.

• True
• FALSE
• NO INFORMATION

In most parts of the ocean floor, the water temperature is very hot.

• True
• FALSE
• NO INFORMATION

The first diving suits were very practical.

• True
• FALSE
• NO INFORMATION

The earliest divers carried their own air with them.

• True
• FALSE
• NO INFORMATION

The early submersibles had motors.

• True
• FALSE
• NO INFORMATION

Jacques Piccard broke Beebe and Barton’s deep-sea diving record.

• True
• FALSE
• NO INFORMATION