#18 Sound - Get Materials
Key: (1st/2nd/3rd) denote needed quantities: (1st) enough for 1 student doing all activities; (2nd) enough for 30 students working in self-paced pairs; (3rd) enough for 30 students working in pairs on the same lesson. Starred* items may be purchased below.
* 1/5/10: lower tuning forks stamped with frequency* 1/5/10: higher tuning forks stamped with frequency
1/10/10: drinking glasses or beakers
* 4/20/40: bobby pins
4/40/40: medium sized cans
2/10/20: soda bottles or equivalent
1/10/10: scissors
4/40/40: 4x6 index cards
* 1/2/2: rolls adding machine tape
* 2/20/20: straight pins
* 1/2/2: rolls masking tape
* 3/15/30: clothespins
* 3/30/30: rubber bands
1/1/1: jar petroleum jelly
1/10/10: panes of glass, approximately 10 x 10 cm
1/20/50: pennies
* 1/1/1: spool of thread
1/10/10: meter sticks or metric rulers
1/1/1: wall clock with second-hand sweep (or wrist watches)
1/10/10: hand calculators
1/3/10: Ping-Pong balls (marbles)
1/6/10: dinner forks
1/1/1: roll of string
1/5/10: hammer and nails (optional)
* 7/70/70: straight plastic straws
* 0.2/1/2: cups of clay
* 2/15/20: paper clips
1/1/1: bottle cooking oil (baby oil)
* 1/1/1: roll of thin bare wire, about 22 gauge
1/1/1: wire cutters (optional)
1/4/10: tuna cans or equivalent
1/4/10: old phonograph records
1/1/1: paper punch tool
1/1/1: pairs of wood blocks (or a spoon and pan)
