> The water is rising! The river is spreading into the streets of the > town! It's a flood! > > Rivers often cause floods because of too much rain or the sudden > melting of lots of ice and snow. A...
Why the sea is salty
You could be out in the middle of the ocean---surrounded by thousands of miles (kilometers) of water---and not have a drop of water you could drink. For seawater is full of salt. If you did drink it,...