Experiment

1
Experiment

• 8-4
• Project 1
• March 3, 2008

2
Which Toothpaste is the Best Above All the Rest

• Testing the whitening of toothpaste

3
PURPOSE

• The question Im going to ask is what brand of
  whitening toothpaste is going to whiten your
  teeth the best?

4
HYPOTHESIS

• I think the brand of whitening toothpaste that is
  going to whiten your teeth the best is Aqua
  Fresh. I think this because it has micro-buffing
  particles which I believe will make your teeth
  whiter.

5
MATERIALS

• Pot
• 12 eggs
• Kettle
• Instant coffee
• Water
• Spoon
• Measuring cup
• Timer
• Whitening guide

• Stove
• Toothbrush
• 4 medium containers
• Permanent marker
• 4 small paper plates
• Whitening toothpaste
• Crest
• Aqua Fresh
• Colgate
• Arm Hammer

6
METHOD

• Put 4 egg in a pot of water and boil the eggs for
  8 min after the water starts boiling
• Fill the kettle with water and bring to a boil.
• Put 1 cup of boiling water in each of the medium
  containers.
• Put 1 teaspoon of instant coffee in to each of
  the 4 containers and stir
• Place 1 boiled egg into each of the 4 containers
  of coffee
• Let the eggs soak in the coffee for 3 ½ hours
• Take out the eggs and place the eggs on the 4
  paper plates to dry

• Get a toothbrush, and put a full strip of one of
  the toothpastes on it
• Then brush 1 egg in the same spot with even
  pressure for 2 min
• Rinse extra toothpaste off egg and toothbrush
• Compare the brushed egg to
  the
  whitening guide
• Write the brand of toothpaste on the egg with the
  marker
• Record the results
• Repeat steps 8-12 with the other 3 eggs and 3
  toothpastes
• Repeat steps 1-14 two more times

7
VARIABLES

• Manipulating Variables
• The brand of toothpaste
• Responding Variables
• How white the egg got after brushing for 2
  minutes
• Controlled Variables
• The type and amount of coffee
• The amount of water
• The soaking time of the eggs
• The pressure you use brushing the egg
• The brushing time for each egg
• The whitening guide

8
RESULTS
9
ANALYASIS
10
CONCLUSION

• In conclusion, I found out by doing this
  experiment that the brand of whitening toothpaste
  that whitens your teeth the best is Arm Hammer.
  My hypothesis was not correct because I said
  Aqua Fresh was going to be the best, but it came
  in third. However all the brands of toothpaste
  were not very far apart in the results, so which
  ever brand of toothpaste you chose will do a good
  job.

11
SOURE OF ERROR

• The pressure used brushing the eggs could have
  been different for some of the eggs.
• Could have put more toothpaste on the brush for
  some of the eggs.
• Could have put more coffee in some of the
  containers than the others, therefore some of the
  eggs could have been darker to begin.
• May have not brushed directly in the same spot
  for 2 minutes.

12
WAYS TO IMPROVE

• Could have wet the egg before brushing, because
  your teeth are wet when you brush them.
• Could use an electric toothbrush then the
  pressure would be the same.
• Could have soaked the eggs with different liquids
  as well as coffee to get a better idea of the
  whitening power of the toothpaste.