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Lab #21.1
Heat: Chapter 21
Dance of the Molecules
Purpose
In this activity, you will
investigate the difference
between hot water and cold
water—on the molecular level.
Discussion
The difference between hot
things and cold things is
referred to as temperature. The
temperature of an object depends
on the kinetic energy of the
random motions of its molecules.
A thermometer can be used to
measure temperature, but we
can’t always tell a hot thing
from a cold thing just by
looking at it. Consider a glass
of hot water and a glass of cold
water side by side. The water
molecules in each glass don’t
appear to be moving differently
from each other. But they are.
Follow the steps below to see
the difference.
Required
Equipment
2- 400ml Glass
Beakers, Hot Water, Cold Water,
Food Coloring.
Download
Student Worksheet
Teacher Notes
Return to Lab Menu
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The "hot" and
"cold" water used in this
experiment is just "tap
water". The "food coloring"
required for this lab is readily
available at your local grocery
or convenience store. |
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