Dancing Raisins and The Scientific Method

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Dancing Raisins and The Scientific Method

• 6th Grade Science

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Scientific Method

• This is a simple review of the scientific method.
• You should already know this, but since we
  understand that over the summer information tends
  to fall out of your head we will review it
  together.

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Steps of the Scientific Method

• State the question
• Form a hypothesis
• Test the hypothesis
• Record and study data
• Analyze the results
• Draw a conclusion
• Communicate Results

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Dancing Raisins

• Materials
• 7-UP or Sprite
• Water
• Clear glass or cup
• Fresh Raisins

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State the Question

• What question could we ask based on the materials
  we have available?
• What will happen to the raisins when you put them
  in sprite? Water?
• Write down the question.

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Form a Hypothesis

• What do you think will happen when we put the
  raisin in the sprite? Water?
• Write down your hypothesis.

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Test the Hypothesis

• Lets test our hypothesis.
• Put the raisin in the sprite.
• Put the raisin the water.

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Record and Study Data

• What happened to the raisin in the Sprite?
• Write it.
• What happened to the raisin in the water?
• Write it.

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Independent and Dependent Variables

• Independent and dependent variables are related
  to one another.
• The Independent variable is what you, the
  experimenter, changes in order to do your
  experiment.
• The dependent variable is what changes when the
  independent variable changes - the dependent
  variable depends on the outcome of the
  independent variable.

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Independent and Dependent Variables

• In our raisin experiment, what part is the
  independent variable?
• Write it down.
• The different types of liquid.
• What part is the dependent variable?
• Write it down
• The behavior of the raisins.

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Draw a Conclusion

• Why do you think the raisins behaved the way they
  did?
• Think about it . . . . . . . . . . . . . . . .
• Write it
• Lets share

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Experiments With Sponge Bob and Mr. Krabs
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Experiments with Sponge Bob

• Mr. Krabs created a secret ingredient for a
  breath mint that he thinks will cure the bad
  breath people get from eating crabby patties at
  the Krusty Krab.
• What question was he asking in this experiment?

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Experiments with Sponge Bob

• He asked 100 customers with a history of bad
  breath to try his new breath mint.
• He had 50 customers (group A) eat a breath mint
  after they finished eating a crabby patty.
• The other 50 (group B) also received a breath
  mint after they finished the sandwich, however it
  was just a regular breath mint and didnt have
  the secret ingredient.

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Can You Create a Hypothesis for Mr. Krabs
Experiment?
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Experiments with Sponge Bob

• Both groups were told that they were getting the
  breath mint that would cure their bad breath.
• Two hours after eating the crabby patties . . . .
  

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Experiments with Sponge Bob

• Thirty customers in Group A reported having
  better breath than they normally had after eating
  crabby patties.
• Ten customers in Group B reported having better
  breath than they normally had after eating crabby
  patties.

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Have to Know KnowledgeCONTROL GROUP

• What is it?
• In an experiment it is the group of test subjects
  that is not given anything different and nothing
  is changed for.

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Questions

• Which people are in the control group?
• What is the independent variable?
• What is the dependent variable?
• What should Mr. Krabs conclusion be?
• Why do you think 10 people in group B reported
  fresher breath?