Physics of Sound

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Physics of Sound
Welcome! Please fill in the Venn Diagram (located
on the wall)

• Then brainstorm how many things you heard
  between 5 am- 8 am

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Linda Tisdale4th grade teacherMonte Sano
Elementary
1. How many sounds did you list?

• 2. What is the most unusual thing you heard this
  morning?

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Overview of Our Day

• Investigations 12
• Guide Walkthrough
• Breaks
• Lunch
• Investigations 3

ltisdale_at_hsv.k12.al.us
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Alabama Course of Study
Objective 2 Compare different pitches of sound
produced by changing size, tension, amount, or
type of vibrating material.

• Describe the relationship between the structure
  of the ear and hearing.

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Science Notebooks

• Question/Problem/Purpose
• A hypothesis is a statement that provides an
  explanation (based on observations, evidence, and
  past experience) of an event or phenomenon.
• Procedure/Planning
• Results/Data/Observations
• Conclusion/What I Learned
• Next Steps/New Questions

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Drop Challenge

• Terms property discrimination
• Question to investigate
• Using your notebook, predict how each object will
  sound.
• Complete the challenge and record your results.
• List the properties of each sound on the chart.

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Whats the Science?

• Sounds have identifiable characteristics.
• Objects can be identified by the sound they make
  when dropped.

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See Foss Science Stories, p. 9-10.

• Sound has properties that help you determine
  the identity of an object.

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Part 2 Drop Codes
What are some ways that people get information
from sound?
Can you use your drop objects and drop chamber to
develop a code that can be used for communicating?
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Whats the Science?

• The identifiable properties of sounds can be used
  to make a code.
• Sounds can convey information.

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Sound and Vibrations (Part 3)

• The Long Gong
• Door Fiddle
• Tone Generator

Problem of the Week, etc.
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Each group will set up each mini activity and
rotate.
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Vibration and Pitch (Investigation 2)

• How are high and low sounds made?

• Feel the side of your throat as you talk to your
  neighbor.
• Decide on a definition for the word pitch.
• Look at science stories for investigation 2.

• How can I change the pitch of the sound coming
  from the tongue depressor?

• Position the tongue depressor so it sticks off
  the table like a little diving board.
• Hold with the heel of your hand.
• Pluck the tongue depressor.

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Whats the Science?

• Sound originates from vibrating sources.
• Pitch is how high or low a sound is.
• Differences in pitch are caused by the
  differences in the rate at which objects vibrate.

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Slinky Activity

• What do we do?

• Whats going on?

• Stretch the slinky out on the floor to about 3
  meters.
• The sound source (person 1) gives the slinky a
  push and the receiver (person 2) represents the
  ear.

• Each coil represents a molecule of a material.
• With a push, the coils compress against each
  other.
• The compression travels to the other end of the
  slinky as a wave.
• Energy is transmitted through the coils and
  travels from source to receiver.

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Each group will set up each mini activity and
rotate.

• What to make

• Whats the Science

• Waterphone
• Xylophone
• Kalimba
• String Beam

• Long objects vibrate slowly and have a low pitch
• Short objects vibrate quickly and have a high
  pitch.

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Investigation 3

• Sound Vocabulary Activity

• Ear worksheet

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Sound through Air, Water, and Wood

• Questions

• How to Explore

• How is sound different when heard through air
  than when heard through water?
• How can we use the megaphone to amplify sounds in
  the room?
• How is sound different when heard through air
  than when heard through water?
• How is sound different when heard through solids?
• How is sound different when heard through wood?

• Listening tube
• Megaphone

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Take a look at the student sheets

• Follow the directions on student sheet 16
• Then do WS 17
• See extension (p.21)

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Work cited
Video for this PowerPoint is from United
Streaming and was written by The Discovery Channel

• Unitedstreaming.com

http//www.bbc.co.uk/schools/ks2bitesize/science/a
ctivities/changing_sounds.shtml
BBC
Foss Website
http//www.fossweb.com/modules3-6/index.html
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Journal Entry

• Make a 3-2-1
• List 3 things I learned about the Physics of
  Sound.
• 2-WOWs (that really surprised me!)
• What is 1 question I still have?
• Lastly, list a star and wish for yourself.