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Unit 19: Biology Part 2 Page 88 of 137

Activities and Experiments

Lesson 1: Skin, Bones & Muscles

Experiment: Does drinking soda weaken your bones?

According to the data in the table below, does drinking soda weaken your
bones?

Bones fractured Bones not fractured
Soda drinkers 38 69
Non soda drinkers 5 52

Answer: What percent of the soda-drinkers had fractured bones? What
percent of non-soda-drinkers had fractured bones? 38+69= 107. That

means out of 107, 38 had fractured bones which mean 36% (38 divided by
107). 5+52 = 57. That means that out of 57 only 5 or 9% had fractures.
That makes a strong case for the effect of soda, but it’s not a cause. In order
to know if drinking soda causes weak bones, further research would have to
be done.

Experiment: Make your own brain

Materials:

 2 cups of sand

 1 ½ cups of instant potato flakes
 2 ½ cups of warm water
 A couple drops of red food coloring
 A 1 gallon plastic bag.

Make the brain:

Mix together in the plastic bag. When fully mixed together you’ll have
something that’s the approximate weight, shape, and size of a human brain.
Watch out for zombies!

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