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Student list or log
Ask students to compose a list (or compile a log) of electrical switches they use in a 24-hour period.
Lesson Extension:
Have the students find examples of different kinds of switches, such as magnetic or temperature-sensitive switches. Ask them to build some of these on their own and incorporate them into [ 4 @ 4 N o r m a l CJ OJ PJ QJ mH @ ` @ H e a d i n g 2 $$@& 5OJ PJ QJ D ` D H e a d i n g 3 $$@& 5CJ OJ PJ QJ D ` D H e a d i n g 4 $$@& 5CJ OJ PJ QJ @ ` @ H e a d i n g 7 $@& 6CJ OJ PJ QJ <