Diffusion causes the two to mix to achieve equilibrium of salt concentration.
The water cycle, when the water evaporates into the cloud it leaves the salt in the ocean then rains down and we have fresh water.
swim in itmake an salt water aquarium drink itput in in an aquarium
Although pond water can contain fresh water, some ponds also contain brackish or salt water.
The water must be heated to drive the pure water off as water vapor and leave the salts behind. This process is called "distillation". Another process is reverse osmosis filtration through a series...