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Mini-Quiz: Evaporation is Changing Liquid to Gas

by Ron Kurtus (7 February 2007)

Take this Mini-Quiz to check your understanding of the lesson material.



1. Why are there molecules with enough energy to escape a liquid?

There is a range of velocities for an average kinetic energy

Smaller molecules have more energy

Those are really gas molecules

2. Why does evaporating liquid on your skin feel cooler?

The cooling effect is a clever illusion

Evaporating liquid actually makes your skin feel hotter

Evaporation lowers the average kinetic energy of the remaining molecules

3. What is an example of blowing on a liquid to make it cooler?

Blowing up a water balloon

Blowing on hot soup

Blowing on a piece of dry ice

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.


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