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Why Ice Floats

Why Ice Floats. Q. Imagine a frozen lake in winter. Is there anything living in this lake during wintertime? A. A variety of things… fish, turtles, many different plants. Why Ice Floats. Q. What would happen to these organisms if ice were more dense than liquid water?

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Why Ice Floats

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  1. Why Ice Floats Q. Imagine a frozen lake in winter. Is there anything living in this lake during wintertime? A. A variety of things… fish, turtles, many different plants.

  2. Why Ice Floats Q. What would happen to these organisms if ice were more dense than liquid water? • The ice would sink as it formed instead of forming a protective shield for the organisms in the water below. • http://ed.ted.com/lessons/why-does-ice-float-in-water-george-zaidan-and-charles-morton

  3. Why Ice Floats • Frozen water and liquid water have the same mass BUT the water takes up more space as ice than it did as a liquid. (due to the gridlike crystal structure) • This means that ice is less dense than liquid water. • Iced tea!

  4. Specific Heat • Specific heat is the amount of heat needed to increase the temperature of a certain mass of a substance by 1° C. • Water has an unusually high specific heat which means that it requires a lot of heat to increase its temperature.

  5. Think about this… • On a hot July day, the air, sidewalk, and sandy beach are HOT! But if you jump into a pool or the ocean the water is cool. • If you were to go for a swim at night, the water is warm compared to the cool air. Why does this happen?

  6. Because… • In the summer, the sun’s heat warms the land more quickly than the water. The warm land heats the air above it. • Remember that it takes more heat to increase the temperature of the water. • At night, the land/air cools off faster than the water does.

  7. Polar molecule Surface tension Capillary action Solution Solvent Evaporation Condensation Specific heat Words Worth Knowing (ISN #39)

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