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Lesson |
Mode of teaching |
Resources |
Possible homework |
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1 |
Introduction to sound. aims :- a)
To
show sound is a form of energy. b)
Travels
as waves. c)
Can
be reflected. |
Teacher and
class discussion. Make comparisons with other forms of waves e.g. Light,
ripples in water, radiowaves etc. |
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Worksheet
Homework 1 |
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2 |
Using an oscilloscope to represent sound. aims:- a)
To
show that sounds of different pitch/frequency & b)
To
show that sounds of different loudness produce different wave patterns. NOTE that the oscilloscope only represents sound waves. |
Demo with some
class participation. Groupwork |
SAFETY : take care with electrical
equipment. Oscilloscope,
Microphone, tuning forks, signal generator, loudspeaker. Worksheet 2
Pitch sorting (copy solution in books) |
Make a list of
higher and lower pitched sounds. Note that
higher pitch = higher frequency and lower pitch = lower frequency. Extension
Worksheet Homework 2 |
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3 |
Soft and loud sounds. aims:- a)
Introduce
terms SOFT and LOUD. b)
Link
soft sounds to less energy. c)
Loud
sounds to greater energy. |
Demo with class
participation. |
Oscilloscope,
Microphone, radio, tuning forks. |
Make a list of
louder and softer sounds. |
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4 |
Vibrations. aims:- Show that sound
is produced by vibrating objects. Link pitch and
frequency to the number of vibrations per second. |
Demo or class
practical. |
Loudspeaker,
tuning forks, signal generator, guitar. Extension work
available Pages 89,90,91 (sound and music) |
Worksheet
Homework 4 |
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5 |
Vibrations and waves. aims:- Visual
distinguishing of high and low frequency waves. Visual
distinguishing of soft and loud sound wave representations. |
Teacher and
class discussion. Demonstration. OHP sheets. |
Oscilloscope,
signal generator, microphone, loudspeaker. |
Worksheet
Homework 5 |
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6 |
I NVESTIGATIONS Introduce
pupils to a circus of experiments and explain that they are to investigate
how to alter:- a)
Loudness. b)
Pitch/frequency. Allow each
group access to apparatus so that they can predict how sound could be
changed. aims:- a)
Different
apparatus often produce different frequency sounds. b)
Can
alter loudness by altering the energy applied. c)
Can
often alter frequency by changing the size or tension of vibrating object. d)
Reinforcing
lessons on frequency and loudness. e)
Recording
of investigations in formal style. |
Class practicals |
Circus of
apparatus producing different sounds. SAFETY
special care must be taken with the electrical equipment and goggles must be
worn with the sonometer. |
Complete the
write up of one of the investigations in best for AT 1. Possible use of word processors
in S & M resources centre. |
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7/8 |
Pupils complete
investigations |
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9/10 |
The Ear. aims:- a)
Introduce
hearing as the sense that detects sound. b)
Compare
the hearing range of humans to that of other animals. c)
Introduce
the components of the ear. d)
Inform
of hearing defects i.e. ·
eardrum
damage. ·
cilliary nerve damage. ·
auditory
nerve damage. |
Teacher &
class discussion. Demonstration
with class participation. Notes |
Signal
generator & loudspeaker. Ear model. Cut-out on ear. |
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11 |
Speed of sound. aims:- Inform that
sound travel at a finite sped. make comparisons between the speed of sound
with the speed of light and forms of travel. * Why do we
hear the thunder after we see the lightning ? |
Teacher &
class discussion. Demonstration. Notes. |
Fastest person
10 m/s Speed of sound
in air 340 m/s speed of light = 300000000 m/s. Use car
headlamp & horn for demonstration on the playing fields. |
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12 |
Amplitude. aims:- a)
Introduce
the term amplitude. b)
Relate
loudness, amplitude and energy. c)
Greater
loudness <-> Greater energy <-> Larger amplitude. d)
Relate
loudness, amplitude and energy. |
Class teacher
discussion. Waves OHP. Notes |
Pupils label
diagrams. OHP. Microphone,
Signal generator and loudspeaker. |
Revision sheet
1 |
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13 |
Revision. aims:- a)
reinforcement. |
Pupils work
through revision sheets 1,2,3 |
Revision sheets
1,2,3. |
revise |
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14 |
TEST |
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