Properties of Ocean Water

The density of seawater is

• slightly higher than that of freshwater

• slightly lower than that of freshwater

• double that of freshwater

• half that of freshwater

Tags

NGSS.MS-PS1-2

If you needed to make 1L of 40 ppt seawater, how many grams of salt would you add?

• 10

• 20

• 40

• 80

If you needed to make 35 ppt seawater in 500 mL of water (same as a 1/2 liter), how much salt would you need?

• 35 grams

• 17.5 grams

• 70 grams

What would you use this thing for?

• to measure the turbidity

• to measure the temperature

• to measure the density

• to measure the salinity

Which process increases the salinity of water?

• runoff from land

• formation of sea ice

• precipitation

• melting of sea ice

If I have freshwater that is less dense, what will it do in comparison to salt water that is more dense?

• The more dense water will float and the less dense water will sink.

• The more dense water will sink and the less dense water will float

• Nothing they will mix evenly.

What two elements make up salt water?

• Sodium Chloride

• Sodium Salt

• Salt Chloride

• Potassium Chloride

The measurement of salinity is

• the amount of salt in the water.

• the amount of chloride in the water.

• the amount of potassium in the water.

• the amount of nutrients in the water.

As the temperature of ocean water changes from 10 to 30 degrees C, how does the density change?

• The water becomes more dense

• The water becomes less dense

• The density does not change

• It is impossible to predict

Tags

NGSS.MS-PS1-4

What is the average salinity of ocean water?

• 35 parts per thousand

• 25 parts per thousand

• 45 parts per thousand

• 15 parts per thousand