Answers to Temperature Exercises

Let’s see how you did! If you didn’t get a few of these, don’t let it stress you out – it just means you need to play with more experiments in this area. We’re all works in progress, and we have our entire lifetime to puzzle together the mysteries of the universe!

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Answers:
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1. Thermal energy is basically the energy of the molecules moving inside something. The faster the molecules are moving the more thermal energy that something has. The slower they are moving the less thermal energy that something has.

2. Temperature measures thermal energy. In other words, temperature measures the amount that the molecules are moving. Thermometers are speedometers for molecules.

3. Fahrenheit, Celsius, and Kelvin.

4. Absolute zero is a theoretical temperature where molecules and atoms stop moving. This temperature has never been reached in the laboratory but they have come close.

5. Its molecules are moving very quickly.

6. In the hot bowl, the molecules are moving very fast. Since they are moving quickly, they bump into the food coloring molecules more and harder spreading them out faster than in the cold water.

7. Skin.

8. Solid, liquid, gas, plasma

9. Gases and plasma

10. Solid

11. The bonds are forced to stretch and loosen up since the molecules are moving at greater speeds.

12. As a substance reaches its boiling point it changes from a liquid to a gas. As this happens the bonds that are holding the molecules together break allowing the molecules to wander off on their own as a gas.

13. As a substance reaches its freezing point it turns from a liquid to a solid. The bonds tighten up, pulling the molecules into a matrix and forming a nice solid substance.

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