Who Did It?

1
Who Did It?

• Scientific Method Unknowns Lab

2
Purpose

• To introduce the scientific method
• To apply the scientific method

3
Your Task

• Solve the mystery!

4
Police Report

• A blind man, Mr. James John, was robbed while
  walking home on August 9th, 2011 with his seeing
  eye dog. Since Mr. James could not give a
  description of the robber, clues were
  collected from the seeing eye dogs fur.

5
Clues found in the dogs fur

• 2 white powders of unknown origins.

6
Suspect 1 Diet Dan

• Profile
• Mr. Jamess sports nutritionist who never uses
  sugar, only sugar substitute

7
Suspect 2 Laundry Lou

• Profile
• Owns a laundry home delivery service, which
  delivers to Mr. Jamess house, and always carries
  baking soda and washing powder.

8
Suspect 3 Baker Bob

• Profile
• The local baker at Thats So Sweet who is
  always covered in flour, sugar, baking soda, and
  baking powder. Baker Bob is baking the cake for
  Mr. Jamess birthday and is Mr. Jamess brother.

9
Time to solve the mystery

• Develop a method for solving the crime
• Record ALL data
• Keep information organized and neat
• Be very specific
• Was it Diet Dan, Laundry Lou, or Baker Bob?
• Follow ALL directions on your lab hand-out.