Pepper Runs from Soap
Three related teacher demonstrations: Pepper Runs from Soap, Floating Paper Clip, Walking Water.
Teaching & key ideas
1. Pepper Runs from Soap
Materials: Water; shallow dish; pepper; dish soap; swab
What you do: Sprinkle pepper on water and touch soap to the center.
What students see: Pepper races away from the soap.
Question: Is the soap touching every piece of pepper?
2. Floating Paper Clip
Materials: Bowl of water; paper clip; tissue
What you do: Gently lower a paper clip flat onto the water.
What students see: The metal clip floats.
Question: Why can heavy metal stay on top?
3. Walking Water
Materials: 3 cups; colored water; paper towels
What you do: Connect full and empty cups with folded paper towels.
What students see: Colored water climbs and moves into the empty cup.
Question: How can water climb upward?
Lesson flow
Predict → observe three demonstrations → compare what changed → choose independent activity station → cleanup/share.
Guiding questions:
Question: Is the soap touching every piece of pepper?
Question: Why can heavy metal stay on top?
Question: How can water climb upward?