Questions about Bath Bombs

The fizzy bubbles that show up when you toss a bath bomb into a water-filled bathtub are made out of:

• Carbon dioxide

• Oxygen

• Hydrogen

• Nitrogen

Identify the examples of acids or bases that you might find around your home.

• Vinegar and baking soda

• Sugar and salt

• Water and oil

• Flour and rice

The purpose of the cornstarch in homemade bath bombs is:

• To add fragrance

• To act as a binding agent

• To create fizz

• To color the water

Now that you know what most homemade bath bombs are made of and how the bubbles are created, what would you expect to have an influence on the fizziness of the bath bomb?

• The amount of citric acid used

• The temperature of the water

• The color of the bath bomb

• The shape of the bath bomb

What should be placed on the y-axis (the vertical axis) when making a bar graph of your results?

• The average time to dissolve (in seconds)

• The two different recipes

• The number of trials

• The temperature of the solution

Based on your graph and observations, try to answer the following questions: b. Which recipe made the most impressive bath bombs?

• Recipe A

• Recipe B

• Recipe C

• Recipe D

Based on your graph and observations, try to answer the following question: How does having more or less filler (i.e., cornstarch) affect the fizziness of the bath bombs?

• More filler increases fizziness.

• More filler decreases fizziness.

• Filler has no effect on fizziness.

• Less filler decreases fizziness.

Based on your graph and observations, try to answer the following question: Why do you think you got the results that you did?

• The results were unexpected due to random errors.

• The results matched the hypothesis due to controlled variables.

• The results were inconclusive due to insufficient data.

• The results were surprising due to external factors.