Not a Drop to Drink

What is the most common salt dissolved in ocean water?

• Potassium

• Calcium

• Sodium Chloride

• Magnesium

What is the measure of the amount of salt in water called?

• Salinity

• Density

• Solution

• Concentration

How much salt is left behind if one kilogram of ocean water evaporates?

• 15 grams

• 25 grams

• 35 grams

• 45 grams

What is the salinity of ocean water in parts per thousand?

• 25

• 30

• 35

• 40

How does the density of seawater compare to freshwater?

• More dense than freshwater

• Less dense than freshwater

• The same density as freshwater

• Varies with temperature

What is the freezing point of seawater?

• 0 degrees Celsius

• -1 degree Celsius

• -2 degrees Celsius

• -3 degrees Celsius

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What happens to salts when ocean water evaporates?

• They evaporate with the water

• They are left behind

• They dissolve in the air

• They form new compounds