Composition of Ocean Water

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 is the most common salt found in ocean water?

• calcium carbonate

• potassium

• magnesium

• sodium chloride

Tags

NGSS.MS-PS1-1

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

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 is the most abundant element in the Earth's Oceans?

• Hydrogen

• Chlorine

• Oxygen

• Other

Tags

NGSS.MS-PS1-1

Which pie chart MOST accurately reflects the information in the table?

• 
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• 
• 

Which is the most common of the dissolved salts that compose Earth's oceans?

• Magnesium chloride

• Sodium chloride

• Calcium sulfate

• Potassium sulfate

Tags

NGSS.MS-PS1-1

Which are the two most common elements in Earth's ocean?

• Nitrogen and Oxygen

• Silicon and Nitrogen

• Oxygen and Silicon

• Oxygen and Hydrogen

Tags

NGSS.MS-ESS2-4

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 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