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Sometimes things are so common that we never stop to really think about them. We all know from experience that a piece of paper that is soaked in water does not burn easily. Wet wood does not work well in a campfire. What is it about water that keeps things from burning? Think about it first, and then watch the video.
Imagine for a moment that you are stranded in the desert, and running short on water. Or imagine that you are in a boat far out at sea, surrounded by salt water, but no fresh water to drink. Is there any way you could use some science to get something to drink? Of course there is!
We are expecting a hard freeze tonight. The water in our bird baths will probably have a layer of ice, if they don't freeze solid. If cold water sinks, why does the ice form at the top?
