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- Specific Gravity: The measure of the density of something compared to the density of water. A specific gravity of greater than 1 is heavier than water, less than 1 is lighter than water.
- Salinity: The saltiness or the amount of salt dissolved in a body of water like lakes, streams and oceans.
- PPT: The abbreviation for Parts Per Thousand and is used to tell how much salt is dissolved in water (salinity). If there is 1 gram of salt in 1,000 grams of water, the salinity is 1 PPT.
- Conductivity: The ability of a material to allow electricity to move through it. Since salt can conduct electricity, higher salinity has higher conductivity.
- Salt Pans: A natural depression in the ground, where water gathers and then evaporates, leaving salt behind.
- Your blood is only ¼ as salty as the ocean!
- The Don Juan Pond in Antarctica is the saltiest body of water in the world. It has more than 40% salinity and never freezes, even though the water temperature can be -22 degrees F!