Ocean Layers I Quiz

The “Rule of Constant Proportions”

• Allows scientists to determine salinity from the concentration of a

  single ion in seawater

• Means that salinity is constant throughout the oceans

• Means that salinity and temperature have the same effects on seawater

  density

• Means that density of seawater is constant

Seawater is

• A mixture

• An ion

• A compound

• An element

Tags

NGSS.MS-PS1-1

Which of the following has the highest average salinity?

• Mediterranean Sea

• Atlantic Ocean

• Arctic Ocean

• Gulf of Mexico

Traditionally, salinity has been expressed as...?

• grams per cubic centimeter

• parts per million

• grams

• parts per thousand

Which of the following is the most abundant ion in sea water?

• Chloride

• Calcium

• Potassium

• Sulfate

Tags

NGSS.MS-PS1-1

What percentage of average seawater is pure water?

w.

x. 50

y. 75.5

z. 96.5

• 3.5

• 50

• 75.5

• 96.5

As salinity increases, water density ___________.

In the image, which region do you expect to have higher salinity, Region A

or Region B? Why?

• Region A because it is mid-latitude with higher evaporation

• Region B because it is mid-latitude with higher evaporation

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-6

In what two general parts of the globe is salinity typically lowest?

At (1) the equator and (2) high latitudes (1pt each).

• the equator

• high latitudes

• mid-latitudes

• It is the same everywhere.

Tags

NGSS.MS-ESS2-6

What property of water is determined by salinity and temperature?