CH 5B pgs. 1-3 only Seawater and Salinity Quiz

What is salinity?

• The taste of seawater

• The ratio of dissolved substances to the mass of water

• The color of seawater

• The temperature of seawater

What is the typical ocean salinity in parts per thousand (ppt, ‰)?

• 3.5 %

• 35 ppt (‰)

• 1 %

• 1 ‰

What are the two most prevalent ions in seawater?

• Calcium and Sulfate

• Chloride and Sodium

• Nitrate and Phosphate

• Potassium and Magnesium

What is the major dissolved component in seawater?

• Calcium ion

• Sulfate ion

• Potassium ion

• Chloride ion

What is the source of mineral-rich runoff in seawater?

• Rainwater becoming acidic

• Underwater volcanic eruptions

• Salt domes

• Hydrothermal fluids

Where are salt domes found?

• In the atmosphere

• On the seafloor

• Underground and undersea

• On the surface of the ocean

What is the ratio of dissolved substances to the mass of the water sample called?

• Salinity

• Turbidity

• Density

• Viscosity

What is the percentage of chloride ion in the total proportion of dissolved solids in ocean water?

• 75 %

• 65 %

• 55 %

• 45 %

What are hydrothermal fluids?

• Heated ocean water released through vents in the seafloor

• Rainwater becoming acidic

• Mineral-rich runoff from surface rocks

• Underwater volcanic eruptions

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

NGSS.MS-ESS3-1

What are the dissolved substances in seawater?

• All of the above

• Chloride and Sodium

• Dissolved organics

• Fine particles held in suspension