Sunday, September 1, 2013

Day 3-Water

Today we learned about water and all of its properties. We took a written quiz on basic chemistry and an oral quiz with a partner on water. For our oral quiz about water, my partner Alvin and I answered the question: Explain why ocean temperatures fluctuate much less than temperatures on land. The reason is because water has a higher heat capacity than air, meaning that it takes a lot more heat or a lot less heat to cause a significant change in the temperature in the water. This is because water is a liquid, and its molecules are not freely moving around, like they are in the air, which is a gas. Just a little heat will cause molecular motion in the air, but it takes a lot to cause the molecules in the water to start moving.

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