Wednesday, October 1, 2008

yucky science

The kids have been studying oceanography for our science unit the past month. I think they will need another month to finish. Last week they learned about seals and walruses and that these animals have blubber to keep them warm in cold water (they are warm blooded). Today we did an experiment to see how blubber works to keep them warm.
First, we filled a big bowl with ice and water and set it in the freezer for about 15 minutes. Then we tested how long we could keep our hand in the water under the following conditions:
1. bare hand
2. hand with a latex glove on
3. hand with a latex glove heavily covered with vaseline
4. didn't have enough gloves for this one, but it was supposed to be the same as step 3 with an extra glove on top.
They concluded the more layers there were, the warmer their hand was. The vaseline was the blubber and the gloves was the thick skin.
It was really greasy, but fun.

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