Unit 3E: Magnets and Springs - PowerPoint PPT Presentation

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Unit 3E: Magnets and Springs

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When you have completed the investigation decide if you could have changed ... Describe how this can be done and then test if you are correct, report your findings ... – PowerPoint PPT presentation

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Title: Unit 3E: Magnets and Springs


1
Unit 5F Changing sound
Changing Sound How do each of the
instruments make a sound? What is the sound like
from each one? Why do dogs and cats move their
ears?
T
2
Unit 5F Vocabulary
  • Some useful words
  • Pitch
  • Loudness
  • Vibration
  • Muffle
  • Tuning
  • Tension
  • High
  • Low

How high or low a sound appears to be
How loud or quiet a sound is
A to-and-fro motion. Sound is made by vibrations
To make a sound quieter
To make an instrument sound as it should
How tight a string is
A high is squeaky like a mouse
A low sound is booming like a bass drum
V
3
Unit 5F How are sounds made?
  • How are sounds made?
  • How does each object make a sound?

D
4
Unit 5F Sound travelling
  • Sound travelling

D
5
Unit 5F Which materials does sound travel
through best
  • Which materials does sound travel through best
  • What material is the best to stop the sound
    travelling from the alarm?
  • Try various materials in the box to see which is
    the best for the sound to travel through and
    which is the best at keeping the sound in

I
6
Unit 5F Why stopping sound is important
  • Why stopping sound is important

D
7
Unit 5F Sound insulation
  • Sound insulation
  • In this investigation you are going to plan a
    test to measure or observe how well different
    materials muffle sound for use in ear protectors.
  • The materials you have available are
  • - Bubble wrap
  • - Towelling
  • - Foam sheeting
  • - Blanket material
  • Which material do you think will be the best and
    why do you think this?

I
8
Unit 5F Sound insulation
  • How will you make fair comparisons of whether
    the sound is muffled or not?
  • What sound source will you use?
  • What will you vary and how will you ensure that
    the results you record are reliable and fair?
  • How will you record these results?
  • When you have completed the investigation decide
    if you could have changed anything to make your
    investigation better. Do you think there is a
    better way of deciding whether the sound was
    muffled or not? Do some research to see if there
    are any instruments that can be used to measure
    sound levels

I
9
Unit 5F Pitch
  • Pitch

High pitch note Low pitch note
D
10
Unit 5F Changing pitch and loudness of sounds
  • Changing pitch and loudness of sounds

D
11
Unit 5F Guitars
  • Guitars
  • How is the pitch changed on the guitar?

D
12
Unit 5F Changing the pitch of an elastic band
  • Changing the pitch of an elastic band
  • How can you change the pitch of each string?
  • Describe how this can be done and then test if
    you are correct, report your findings

I
13
Unit 5F Other vibrations
  • Other vibrations
  • What is vibrating to make the sound?

A
14
Unit 5F Changing the length of the air column
  • Changing the length of the air column

A
15
Unit 5F Summary
  • Concept map

S
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