1. Electrifying Electromagnets 4 th grade

2. Jimenez 4 th Grade

3. Problem/Question Does the number of winds around the rivet affect the magnet’s strength?

4. Hypothesis If we increase the number of winds around the rivet, then we think that the strength of the electromagnets will increase because of the electromagnetic field.

5. Control Variable Battery Rivet Circuit Washers Wires The number of winds

6. Electrifying Electromagnets Set Up

7. Materials Circuit base Battery Switch Wires Rivet Washers

8. Procedure 1) Make a circuit with a switch, battery, wires, and rivet. 2) First trial: wind the wire around the rivet 25 times at the head. 3) Count how many washers it picks up. 4) Repeat with 45 winds around the rivet. 5) Record your data.

10. Results The rivet with 25 winds picked up an average of 6 washers. The rivet with 45 winds picked up an average of 11.3 washers.

11. Data Table

12. Conclusion: The more winds around the rivet the more washers the electromagnet picked up. The greater number of winds increased the strength of the electromagnet.

13. Bibliography Houston ISD Curriculum Documents www.brainpop.com