13B Seawater

Front

Measure of the ocean's saltiness.

Back

Salinity

Front

Most abundant gas dissolved in the ocean.

Back

Nitrogen

Front

Which of the following is NOT a reason minerals are lost from the ocean: Living organisms use the minerals to construct their shells and skeletons; Minerals are evaporated from the ocean water; Minerals ions settle to the bottom of the ocean floor as clumps of dirt collect; If mineral concentrations get too high, minerals with precipitate out as mineral crystals.

Back

Minerals are evaporated from the ocean water.

Front

Which of the following affect ocean salinity? Freshwater dilutes the ocean near the mouth of rivers, Slower evaporation results in more diluted sea water, Lower rainfall and higher evaporation results in higher salt concentrations.

Back

All answers are correct

Front

What is the best definition of desalination?

Back

Removing salt and minerals from sea water

Front

What per cent of the world's water is fresh water?

Back

2%

Front

Reverse osmosis uses ____________ to remove salt.

Back

pressure

Front

In general, ocean temperatures

Back

decrease with depth

Front

Salty water has a higher freezing temperature.

Back

False

Front

The pressure at the bottom of the ocean is only slightly more than at the surface.

Back

False