Science Literacy Fourth Grade Unit 3 SOUND

sound energywave frequencypitch

The Story of Sound Sound SequenceSoundObject Making the Sound

Comic Strip Framing: Example 1

Comic Strip Framing: Example 2

Comic Strip Framing: Example 3

StatementYesNoWhy Sound waves travel faster through air than a brick wall. It takes only 1/100 th of a second for us to hear sound. Ear drums vibrate like musical drums. Slow sound waves make low sounds. Humans can make a wide variety of sounds.

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Word Before ReadingAfter Reading Discussion/Examples Sound waves Vibration Molecules Frequency Pitch

Sound is a type of energy made by vibrations. When any object vibrates, it causes movement in molecules of air. These molecules are tiny, so tiny we can’t see them, but they create all of the sound we hear. These molecules of air bump into other air molecules close to them, which makes them vibrate too. As the molecules vibrate into each other it causes them to continue bumping into more air molecules. This movement, called sound waves, keeps going until they run out of energy. If your ear is within range of the vibrations, you hear the sound. Picture a stone thrown into a still body of water. The rings of waves expand indefinitely. The same is true with sound. Irregular repeating sound waves create noise, while regular repeating waves produce musical notes.

Sound Sequence Sound Object Making the Sound Pitch of Sound Frequency of Sound

Illustration of LOW Frequency Sounds Illustration of HIGH Frequency Sounds Illustration of how sound travels from person to person Sounds I hear everyday Sound