Ocean Temperature, Pressure & Salinity

Oxygen is able to reach the deep ocean floor because...

• Cold water is denser and carries oxygen down as it sinks

• Warm water is denser and carries oxygen down as it sinks

• Oxygen is a heavy atom and sinks on its own to the ocean floor

• All organisms must swim to the surface to breathe oxygen

Which type of organisms helps release minerals into ocean water?

• Endotherms

• Autotrophs

• Decomposers

• Homeotherms

The total amount of salt dissolved in a solution is called...

• Salinity

• Saltiness

• Pressure

• NaCl

Water that has more salinity than fresh water, but not as much as seawater is called...

• Brackish water

• In between water

• River water

• Semi-sea water

Where would you find brackish water?

• At estuaries

• At the beach

• At brine channels

• At the main thermocline

Tags

NGSS.MS-ESS2-4

During osmosis, which way does water move?

• From areas of high to low concentration of salt

• From areas of low to high concentration of salt

These organisms, like eels, spawn in the open ocean, but mature in freshwater.

• Catadromous

• Anadromous

• Endotherms

• Homeotherms

These organisms, like salmon, spawn in freshwater, but juvenile fish move to the open ocean after a year or two

• Catadromous

• Anadromous

• Endotherms

• Homeotherms

True or false? Freshwater organisms can easily live in saltwater environments.

• True

• False

Which has a higher density?

• Seawater

• Freshwater