Transcript CASE 4

Music
The Fair Test
Pan pipes
Team work
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It is possible to get notes from the pipes
by hitting them gently.
This is more hygienic than blowing down
the pipes.
Have a go.
Variables & Values
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What are the Variables & Values
Variables & Values
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Variables
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Values
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Material
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Copper, Plastic.
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Length
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Short, Medium, Long.
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Width
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Narrow, Medium,
Wide.
Outcome Variable
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The notes.
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How are they different?
Outcome Variable
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Your task,
if you are prepared to accept it
Is to find the input variable(s) that affect
the note.
It could be one, two or all three input
variables
Prediction
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In your teams how many of you think :-
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Material will affect the note
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Length will affect the note
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Width will affect the note
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Person B will be the spokes person for your team and must count
the results.
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Voting.
Investigation into
what affects the note ♫
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In your teams:-
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Test two pipes at a time.
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You choose the input variables and record
the outcome.
Listen for big differences.
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You are not looking for differences in the
loudness or tone of the notes.
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Listen for a difference in pitch.
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Doh Ray Me!
Etc
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Think about each input variable in turn
and decide how it affects the note.
Rules of the game.
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Everyone should agree that the notes are
different.
If everyone does not agree then record
the notes as the same.
Your team can only have two pipes at a
time.
You can return and swap them as many
times as you like.
Time 10 minutes.
Recording your results.
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Look at the results table in your booklet.
Record your results in pencil. You may
want to erase some of them later.
Pipes
Materials Length
Copper, Glass
1st pair
A
B
2nd pair
A
B
3rd pair
A
B
4th pair
A
B
short, med, long
Width
Outcome
narrow, med,
wide
High note or
both the same
Recording your results.
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For each test put X in the columns that
describe the pipes A and B.
Record which has the higher note with an
H.
If they are the same write an S.
Team work
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I will ask one person from each team to
answer the questions below your results
chart.
Make sure that everyone in your team
knows the results and can explain them.
You may start.
Music
Results so far
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What have you found out?
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How can you be sure?
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Have each team got a pair of pipes that
proves their conclusions?
Materials Length
Copper, Glass
1st pair
A
B
2nd pair
A
B
3rd pair
A
B
4th pair
A
B
short, med, long
Width
Outcome
narrow, med, wide
High note or
both the same
Have another go
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Try to find a few more ‘really good pairs’
that really prove which variable(s) affect
the notes.
Can you prove that some variables do not
affect the note?
Length
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Is there a pair of pipes that tells you how
length affects the note?
Which pair?
Material
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Is there a pair of pipes that tells you how
material affects the note?
Which pair?
Width
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Is there a pair of pipes that tells you how
width affects the note?
Which pair?
What is a ‘fair test’?
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I want each team to write a sentence to
describe what you must do to have a ‘fair
test’.
Use the words that we started with at the
beginning of class.
More thinking about…The ‘fair’ test
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In your teams work through
questions
1–5
I will ask one person from each team for
an answer. So make sure you all agree.
More thinking about…2 & 3
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Work by yourself on questions 6 – 11.
Music
Homework:
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Have you seen an example were people
have done a test that is not fair.
It could be:A TV or shop advert.
Something at home, in the kitchen.
A sporting activity.
Well done everyone.
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You have been good team players.
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You have listen to other peoples ideas.
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You have thought about how to do a fair
test.
You have proved your conclusions.
Last thing
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What was the hardest part of the lesson
for you?
How did you solve the problem?
Fair Tests Questions
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