Most are natural freshwater, but some may be saltwater.
The Nile river is indeed a freshwater river. The saltwater crocildiles are there because the tide of the Mediterranean brings in saltwater, giving saltwater crocs a good habitat.
a lake is freshwater since it is not connected to an ocean it will not have salt water. Lakes are replenished by the water cycle (rain) which is not salt water.
Freshwater but some can definitely be identified as salt water
fresh
salt water
Fresh water
fresh water
There is by far more saltwater in the world. The oceans of the world are saltwater, and by volume the oceans compose over ninety percent of Earth's water.
Salt water has a higher density. The general rule is that an object will float if it has less density than the liquid in which it is placed.
Salt water is more dense than fresh water because salt water has more mass than fresh water.
Salt water is denser hence HEAVIER then fresh water, Salt Water has a density of 1.02g/ml and Fresh Water has a density of 1.00g/ml.
Freshwater is less dense than saltwater, and so it tends to float on top, as less dense things tend to float on denser things.
Freshwater.
Freshwater
Lake Maracaibo is saltwater, being an estuary rather than a true lake.
freshwater
Most lakes contain freshwater. From this fact, I'm assuming it is made out of freshwater, rather than saltwater.
No, all LAKES are freshwater. OCEANS are saltwater. Lake Michigan is a freshwater lake, but the answer above is false. See, for example, http://en.wikipedia.org/wiki/Great_Salt_Lake or http://en.wikipedia.org/wiki/Lake
Fresh water
Lake Okeechobee is due to freashwater
Saltwater but with a hint of freshwater
Freash water
No. Lake water is freshwater and ocean water is saltwater.
No, all LAKES are freshwater. OCEANS are saltwater. Lake Michigan is a freshwater lake, but the answer above is false. See, for example, http://en.wikipedia.org/wiki/Great_Salt_Lake or http://en.wikipedia.org/wiki/Lake