1
a) vibrations
b) longitudinal
c) oscilloscope
d) compressions, rarefactions
e) reflected
f) faster
g) faster
h) vacuum
i) amplitude
j) frequency
2
a) The sound wave reaches Bryony from the stereo system through the air.
b) The part of Bryony's ear that detects the sound is the eardrum.
c) The sound makes the eardrum vibrate.
d) They sound different because they have different timbres, which are determined by the unique combination of overtones produced by each instrument.
e) The sound becomes quieter (louder decreases) as she walks away.
Parent Tip: Review the logic above to help your child master the concept of science sound worksheet.