Ch. 13 Oceans Quiz

About how much of the earth’s surface is covered by the ocean?

• 87

• 97

• 71

• 60

What are the four major basins of the ocean?

• Atlantic, pacific, arctic, red sea

• Atlantic, pacific, arctic, indian

• atlantic, pacific, arctic, induan

• atlantic, arctic, indian, Caribbean

what is the name of the deepest trench

• the mariana trench

• the mariana reef

• the great mariana reef

• the great mariana trench

what is salinity

• Amount of salt in water

• Amount of minerals in water

• amount of dissolved salts in ocean

• amount of salt and minerals in water

What makes up seawater salinity

• Sodium, magnesium

• Sodium chloride, sulfate, magnesium

• magnesium, sulfur, sodium

• sodium chloride

In the ocean, as you go deeper what happens to pressure

• decreases

• increases

• stays the same

What is the main factor that determines how fast sound travels

• temperature of seawater

• temperature and density of water

• location, density, and temperature

• density of seawater

What is the deepest layer of the ocean

• abyssal zone

• littoral zone

• photic zone

• aphasic zone

Why is echolocation important for animals

• food, navigation

• navigation only

• shelter, communication, food

• navigation, food, communication

The ocean holds about 97% of water

• true

• false