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Worksheets13B Seawater
Total questions: 11
Worksheet time: 11mins
Measure of the ocean's saltiness.
Density
Salinity
Pressure
Dissolution
Most abundant gas dissolved in the ocean.
Oxygen
Nitrogen
Carbon dioxide
Argon
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.
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
All answers are correct
What is the best definition of desalination?
Removing harmful chemicals from water
Filtering dirty water
Cleaning natural spring water
Removing salt and minerals from sea water
What per cent of the world's water is fresh water?
1%
2%
5%
10%
Reverse osmosis uses ____________ to remove salt.
filters
wind turbines
oxygen
pressure
In general, ocean temperatures
increase with depth
decrease with depth
decrease then increase with depth
Are the same throughout the whole ocean
Salty water has a higher freezing temperature.
True
False
The pressure at the bottom of the ocean is only slightly more than at the surface.
True
False
