Activity 3: DEND ITI Directione: Do the simple activity carefully. Then, answer the questions based on your observations Write your answers on a separate sheet of paper Problem: When doos friction occur? Materiale: piece of wire Procedure: 1. Get a piece of wire at least 12 inches long 2. Bend and unbend the wire twenty-five times quickly 3. Feel the wire after bending, Guide Questions: 1. What happened to the wire after bending it twenty-five times? 2. Why did it turn hot? 3. Can we also produce heat by using our hands? How? 4. What will be produced if you rub two things together? Conclusion: How does friction occur?

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