Salinity (Science Experiments)
Where did the salt come from?
Making a Hydrometer: How can salinity be measured?
Design Your Own Experiment
What gives ocean water its salty taste? The answer lies in its salinity, the total salt content of the water. Saline (salty) substances are present in all water, even rain water, but sodium and chlorine are the two most abundant saline substances dissolved in ocean water.
In 1872, the H.M.S. Challenger began its worldwide ocean expedition from Portsmouth, England. On board were 240 sailors and scientists, including four naturalists and their support team. Originally built as a warship, the ship was converted into a floating scientific lab by the British government to study the biology of the sea, as well as the chemical and physical properties of the water. Between 1872 and 1876, the ship sailed 68,890 miles (110,908 kilometers) and made 492 stops. Nearly 5,000 new species, including giant worms and deep-sea shrimp almost as big as lobsters, were brought on board and identified.
Samples of seawater were also collected and analyzed for...
(The entire section is 2806 words.)
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