Sound is made by vibrations. When you hit
the glass with the spoon, the glass vibrates.
An empty glass makes a high-pitched sound.
When you add water, the liquid weakens the
vibrations. The more water you put in, the slower
the glass will vibrate when you hit it, making a
lower sound. The less water, the faster the glass
vibrates, making a higher sound.
S d i d b ib ti Wh
Dr.
Zed
explains
Try the experiment again
with milk instead of water.
Does it sound different?
(Skip the food colouring
and drink the milk
afterwards.)
Try the experiment again
Ooze's
challenge:
ILLUSTRATION:
RÉMY
SIMARD
PHOTO:
LAURA
ARSIE
CONSULTANT:
SANDY
EIX,
SCIENCE
WORLD
BRITISH
COLUMBIA
Chickadee 25
M
u
s
i
c
!
Parents: Share with us!
See page 31.
p
Dr.
Zed
explains
Dr
Zed
explains
