5D Review Ocean Salinity Quiz

What is the average salinity range of open-ocean water?

• 35-40 ‰

• 33-38 ‰

• 30-35 ‰

• 38-42 ‰

Where do salinity variations tend to be most extreme?

• Open ocean

• Estuaries

• Inland lakes

• Coastal areas

What causes hypersaline conditions in inland lakes?

• All of the above

• Limited open-ocean circulation

• High freshwater input

• High evaporation rates

What is the salinity of the Dead Sea compared to seawater?

• 10 times greater

• 100 times greater

• 1,000 times greater

• the same

What is the salinity of tap water?

• 42 ppt

• 280 ppt

• 1 ppt

• below 0.8 ppt

What process decreases salinity in seawater?

• Melting Icebergs

• Evaporation

• Sea ice formation

• Stream runoff

What is the largest reservoir of Earth's water?

• atmosphere

• lakes

• ocean

• continents

Tags

NGSS.MS-ESS2-4

What is the average residence time of the sodium ion in seawater?

• 100 years

• 1 billion years

• 260 million years

• 500 years

What process cycles dissolved substances out of seawater by opposite charges attracting to the surfaces of different substances?

• Adsorption

• Infiltration of seawater

• Sea spray

• Evaporite formation

Are the oceans becoming saltier through time?

• Yes, due to increased evaporation

• No, they are in a steady-state condition

• Yes, due to excessive sea ice formation

• No, they are becoming less salty