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Grade-7
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A black smoker is a type of hydrothermal vent that ejects superheated water at temperatures of up to 350°C. Salinity is the measure of the saltiness of the ocean’s water. The hydrothermal vents are seen at the bottom of rifts in mid-ocean ridges.
Salinity refers to the concentration of salt dissolved in water.
The majority of hydrothermal vents are found at the bottom of rifts in mid-ocean ridges.
Black smokers are considered chimnies that are formed by deposits of iron sulfides.