Daily Objectives: (1) Formative quiz on symbols for copper, iron, aluminum, zinc; 4 steps to using fire extinguisher; (3) asdf
Lesson: (1) Review questions from Hot Wire lab. (2) Collect answer to, "How can you tell heat has been transferred from one end of the wire to another?" (3) Do "Heat Race" lab. In class we discussed the following questions:
1. Rank the metals for how fast it transfers heat
The metal which transfers heat the fastest was copper. The metal which transfers heat the slowest was iron. The metal which transfers heat slower than copper but faster than iron was aluminum.
[Demonstration: I showed students copper wire from building the dorm. We discussed how copper is used for wiring because it is an excellent conductor of electricity and because it is very bendable. I forgot to use the word "maleable"]
Copper is the choice for wiring buildings because it transfers electricity the same way it transfers heat: very fast! Material that transfers heat or electricity well is called a conductor; material that transfers heat or electricity very poorly is called an insulator.
[Demonstration: Discussed why copper wire is coated in plastic "insulation." I explained that gold is actually a superior conductor to copper but gold is NOT used to wire buildings because of cost. Told story of my ring being shorted on a starter and melting the skin on my finger.
Student also compared the color of my gold ring to copper
Assignment: (1) none