Oceans Unit Test

What is an underwater mountain range where sea-floor spreading occurs?

• abyssal plain

• density

• mid-ocean ridge

• trench

What is the large, flat area on the ocean floor?

• crest

• abyssal plain

• current

• trench

A deep, narrow valley in the ocean floor is called ___________.

• tide

• density

• trough

• trench

About how much of Earth's surface is covered by water?

• 10%

• 50%

• 75%

• 25%

Which of the following is NOT a way that ocean water moves?

• waves

• tides

• rifting

• currents

Which of the following is the name of an ocean? (Select all that apply)

• Arctic

• Coral Reef

• Atlantic

• Pacific

• Europe

Ocean currents affect Earth's climate by __________.

• carrying heat from the equator to the poles

• changing direction frequently

• evaporating at a very slow rate

Tides are caused mainly by ____________.

• the Moon's gravitational pull on the Earth

• deep-water currents

• the water cycle

• the level of salinity in the water

What is the high point of a wave called?

• trough

• trench

• density

• crest

What is the low part of a wave called?

• trough

• trench

• density

• crest