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| You can be a detective! |
Did you know Crime Scene Investigators have to be great at Science? They have to be super observant! One way to solve a crime is with fingerprints. They can do this because everyone has their very own fingerprints that are different from everyone else's. If you do not believe me, try this experiment and see if your fingerprints are different from your friends and family members.
Problem: Are my fingerprints different than my mom's fingerprints?
Hypothesis: I think.....
Materials: sharpened pencil, white paper or make a data table , invisible scotch tape , (handlens is helpful but not required)
Procedure:
1. Take a pencil and color a about an inch square with your pencil. Color hard so it is solid covered and real dark..
2. Take your index finger and stick it in the graphite (thats what the pencil lead is made of ) square you colored.Push down hard so the whole tip of your finger is covered in graphite
3. Stick a piece of tape to the "dirty part" of your finger.
4. Take the piece of tape off and stick the piece of tape on a piece of white paper or use the data chart. You should be able to see your fingerprint.
5. Repeat steps 1-4 with your thumb and pinky.
6. Now let your mom or friend repeat the steps with her fingers.
7. Compare the results.
Data Table
Conclusion : I learned ...
Things to think about:
Were all your fingerprints alike?
Does it matter which hand you used?
Did the data table help?
Why did we do more than one finger?
Do you have toe prints?
How can fingerprints help solve a crime?
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