Underwater Exploration: the Underwater Exploration Quiz Answer 3 University of Wisconsin Sea Grant
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3: You and your friend decide to have a race. You swim a mile in the ocean and your friend swims a mile in a lake. If you are equally good swimmers, who will swim their mile faster?

Answer: The ocean swimmer will swim faster because salt water is more buoyant and it's easier to swim when you float better.

We all know water is denser than air -- it's a heck of a lot easier to walk through air than through water.

But did you know that all water is not the same density?Seawater (salt water) is denser than freshwater, and cold water is slightly denser than warm water. Denser water is also more buoyant -- objects will float better in denser water.