Ocean Water Chemistry

What is the most common salt found in ocean water?

• calcium carbonate

• potassium

• magnesium

• sodium chloride

Which three factors are most important in determining the composition of ocean water?

• temperature, salinity, and density

• volume, mass, and density

• mass, salinity, and density

• volume, temperature, and density

What conditions would cause an increase in the salinity of ocean water?

• high rates of evaporation

• thawing of glaciers

• cold weather

• a river flowing into the sea

Scientists have determined the average salinity of ocean water to be equal to__________.

• 3.45 g/kg

• 34.5 g/kg

• 3.45 g/mL

• 34.5 g/mL

The density of ocean water is affected by temperature and ______________.

• salinity

• warmth

Tags

NGSS.MS-ESS2-6

The two most common ions in seawater are...

• Magnesium

• Calcium

• Sodium

• Chloride

Tags

NGSS.MS-ESS3-1

NGSS.MS-PS1-1

What is the best description of the salinity of ocean water?

• number of grams of salt in one kilogram of water

• number of grams of dissolved chlorine in one kilogram of water

• number of grams of mineral salt in one liter of water

• number of milligrams of dissolved sodium chloride in one liter of water

What conditions would most likely cause a decrease in the salinity of ocean water?

• high rates of evaporation

• freezing of glaciers

• extremely hot weather

• a river flowing into the sea

What is one of the most common materials dissolved in ocean water?

• calcite

• gypsum

• salt

• basalt

Answer explanation

One of the most common materials dissolved in ocean water is salt, making it the correct choice among the options provided.

What term is the measure of dissolved salts in water?

• Thermocline

• Salinity

• Saltiness

• Tides

Answer explanation

Salinity is the measure of dissolved salts in water, making it the correct term in this context.