physical-chemical change

Why Wet Things Don't Burn

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.

Making a Solar Still

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!

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Glowing soda bottle
Is it true that you can mix common, household chemicals with a popular carbonated soda to make it glow in the dark?

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Ice in bird bath
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?

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Cat in snow
Although we have had several days with lots of sun and temperatures up in the 60's, there is still a lot of snow on the ground. Why hasn't it melted away?

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