[ Ch1 | Ch3 | Ch5 | Ch7 | Ch8 | Ch9 | Ch10 | Ch11 | Ch12 | Ch13 | Ch15 | Ch16 | Ch17 | Ch19 ]

HOMEWORK (p277-278)
# 1, 2, 4, 6,
# 11, 15, 25, 27,
# 28, 30

Sound Frequencies Test
(Do teenagers hear higher frequencies?)