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1. Fill in the
blanks using some of the words in the box.
AMPLITUDE,
EAR, ENERGY, COCHLEA, REFLECTED, VIBRATE, WAVES, TUNING FORKS
a. We
hear echoes because sound can be
_________________.
b. We
can see ourselves in mirrors because light
can be ________________.
c. We
know that sound is made by things that _________________.
d. Sound and light travel as ______________.
2. For the
following sentences answer YES or NO ?
a. A man can run faster than the speed
of light. ______
b. The space shuttle can go faster than
a light wave. ______
c. The fastest aeroplanes can go three
times faster than sound. ______
d. The speed of light is about a
million times faster than sound. ______
3. Answer the
following questions on the ear using the words in the box below.
Hammer, Cochlea, Ear-drum,
Stirrup, Anvil
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a. What are the three
bones in the ear called ? __________
___________ ____________
b. Which part of the ear can be damaged
if you stick a pencil in your ear ? ________________
c.
Which part of the ear has very small nerves like tiny hairs in it ?
____________________
4.
Why
do we hear thunder before we see the lightning ? ___________________________________________________________________________________________________________________________________________________________________________________________________
5. The
Loudspeaker.
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a. What is the difference between the
way the loudspeakers cone makes high frequency sounds and low frequency sounds
? ________________________________________________________________________________________________________________________________________________________________________
b. What does a microphone change sound into ? _______________________________
c. What does a loudspeaker change into sound ? _______________________________
6.
a. What do things have to do to make
sound ? __________________________
b. What does the sound from a
loudspeaker travel as ?
__________________
7. An oscilloscope can be used to find out about sound waves.
For the next questions an oscilloscope was used to
investigate four sounds A, B, C and
D.
Look at the waves below that are
seen on the oscilloscope then answer the next 5 questions :-
Use the
letters A, B, C and D to answer these questions.
a. Which two sounds must have been the loudest ? ____ and ____
b. Which two sounds are the softest ? ____ and ____
c. Which two sounds have the lowest frequency ? ____ and ____
d. Which two sounds have the lowest pitch ? ____ and ____
e. Which two sounds have the highest pitch ? ____ and ____
f. Which two sounds have the highest frequency ? ____ and ____
g. Which one sound has a higher frequency and is louder than sound C ? _____
h. Which one sound has the same loudness but higher pitch than C ?
_____
i. Which one sound is the loudest and has the highest pitch ? _____
j. Which two sounds have the highest amplitude ? _____ and _____
8. Below are three different tuning
forks labelled A, B and C :-
a.. Which tuning fork makes the highest frequency sounds ? __________
b. Which
tuning fork makes the lowest frequency
sounds ? ___________
c. How can you make the sound from a
tuning fork louder ? ___________________________________________________________________________________________________________________________________________________________________________________________________