Science type question for my first grade son
My son had his first science fair this week. His project was on bread mold ( the classic wet vs dry.. which molds first).
At the actual fair, his teacher asked him to check out the class experiment, which was does adding food coloring to water affect the time it takes to freeze the water. Their conclusion was that it made no difference.
Here's the fun part: Mrs Wynkoop asked Ethan if he could explain why the food coloring seemed to congregate in the center of the cup. It sort of seemed to have a darker color towards the middle of the cup, as if there was more food coloring there.
I pride myself on being sort of a figure it out kinda guy, so I thought for a few minutes and came up with an idea that perhaps the food coloring had a lower freezing point tha the water, and some of the FC would take longer to freeze. Since the cup would freeze from the sides (I guessed they would anyway, as the sides would stay cold and help freeze from out to in), I reckon that the denser food coloring froze last.
I was wondering if anyone agrees/disagrees/laughs and points accusatory finger.
I did try to Google a few phrases, but they were all parsed out and were of no help.
Help me Tilted Knowledge, you are my only hope.
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The man in black fled across the desert, and the gunslinger followed. -Stephen King
Last edited by dohrk; 04-25-2010 at 04:24 PM..
Reason: edited for spelling
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