Bell ringer Sheet

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• Bell ringer Sheet
• Glue the Bell Ringer sheet into your IAN notebook
  
• (Page 36 IAN)
• Complete Mondays Bell Ringer

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• MYP Unit Question Can you Hear or See me NOW?
• Area of Interaction Health and Social Education
• Learner Profile Thinkers
• Standard S8P4.Students will EXPLORE the wave
  nature of sound and electromagnetic radiation.
• f. Diagram the parts of the wave and explain how
  the parts are affected by changes in amplitude
  and pitch.
• EQ How does changing the frequency or height of
  a wave affect its sounds?
• Learning Target Today I am learning about the
  sound waves because they help me to hear (when I
  want to). ?
• Homework Study for upcoming quiz on FRIDAY

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OPENING- BBC - WAVES
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Work Session Foldable!!! ?
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Label the flaps as follows

• 1- Increase wavelength
• 2- Decrease wavelength
• 3- Increase amplitude
• 4-Decrease wave amplitude

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Inside Flap- (write questions)

• 1- Describe what happens to the PITCH when we
  increase wavelength.
• 2- Describe what happens to PITCH when you
  decrease wavelength
• 3- Describe what happens to the sound when you
  increase AMPLITUDE.
• 4- Describe what happens to the sound when you
  decrease the amplitude

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ANSWERS to Inside Flap-

• 1- The PITCH DECREASES when we increase
  wavelength.
• 2- The PITCH INCREASES when you decrease
  wavelength
• 3- The sound gets LOUDER when you increase
  amplitude.
• 4- The sound gets QUIETER when you decrease the
  amplitude

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The UNKNOW PART OF THE FOLDABLE ?

• Draw a diagram of what each wave should look like
  .

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Diagrams of !-4

• Size of Wavelength

• Amplitude SOUND Waves

A
c
B
D
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Closing- GHOST BUSTERS

• The Most Haunted team left their microphones and
  oscilloscope in the Haunted House overnight and
  the following sound waves were recorded during
  the night.
• Can you match the sound waves to the correct
  ghosts and explain why you think you are correct

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Sound Waves Cornell Notes IAN

• Recall Characteristics
• Sound waves are mechanical waves.
• Mechanical waves require a medium (something to
  travel through).
• Similar to light waves, sound waves can be
  reflected (echo).

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What makes Sound?

• 1. Vibration back and forth motion
• There can not be sound if there is not any
  vibration
• Most vibrations are too fast for you to see.
• Vibrations require energysound is a form of
  energy.

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How does Sound Travel?

• 2. When something vibrates molecules in the air
  crowd together, then spread apart, causing sound
  waves to travel away from the vibrating object

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What Forms of Matter can Sound Travel Through?

• Gas sound travels easily through gases
• It travels about 1,129 feet per second through
  air. (Thats how fast it travels when you talk!)
• Liquids Sound travels through water about 4,794
  feet per second. (Think of what ripples look
  like in the water and how they spread.)
• Solids Sound travels through a solid like wood
  at a rate of 12,620 feet per second. Sound
  travels fastest through solids!
• Sound cannot travel through a vacuum (a space
  that is empty of matter).

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Pitch

• 1. Pitch How high or low a sound is
• The higher the pitch the more squeezed together
  the waves are
• The higher the pitch the higher the frequency
• The lower the pitch the lower the frequency

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What is Frequency Again Mrs. Ellis???

• Frequency describes the number of waves that pass
  a fixed place in a given amount of time.

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Amplitude and Loudness

• Loudness How much energy a sound wave carries.
• The louder the sound, the higher the amplitude.

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Sound Waves IAN 42

• How will the sound be affected by changes in
  wavelength and amplitude?
• Make a data table. Predict, watch and listen.
• Record observations.

Change Decrease wavelength Increase amplitude
Predict
Observed
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Closing- Summary

• Begin with Sound waves are mechanical waves and
  require
• Use complete sentences (minimum of 4).
• Include all key terms (mechanical, medium,
  frequency, pitch, amplitude, loudness).

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High Pitch Sounds

• Mosquito Ringtones and Dog Whistles!
• Different animals can hear high pitch sounds that
  humans cannot.
• Young people can hear higher pitch sounds more
  than old folks.

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Sound Reflection and Absorption

• Reflected sound is called an echo.
• 1. The vibrations are reflecting back to
  you.
• Soft, air-filled objects absorb sound.
• 1. When sound is absorbed, you do not
  hear it because it is not reflected back to
  you.

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1. Sound Waves

• Sound vibrations occur in waves that go out in
  every direction like a circle.
• 1. Sound waves are created by repeated
  patterns of molecules spreading apart and
  squeezing together.

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• Sound Waves have 3 common features
• 1. They
• a. Have a set wavelength
• b. Vibrate at different speeds
• --Frequency the number of complete
  wavelengths, or times an object vibrates per
  second.
• c. Carry Energy
• --amplitude is the amount of energy a
  wave has
• --high amplitude sound is made by
  objects with great vibrating motion

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• Making and Hearing Sounds
• 1. Hearing Sound
• a. Humans have two ears on opposite sides of
  their heads. Each ear gathers sound waves on
  each side of your body.
• b. There are two ways that humans hear sounds.
• With your ears.
• With your brain.

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How do you hear sound?
1. Sound causes your eardrum to vibrate. The
eardrum vibrates differently for each sound.

• The bones of your ear begin to vibrate,
• beginning with the hammer, moves to the anvil,
• and finally the stirrup.

• The sound energy passes to the inner ear.
• This causes the fluid in the cochlea to move.

• The nerves then carry the message to the
• brain.

5. Your brain then tells you what the sound is.
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• Making Sound
• All sounds are made by vibrations.
• Humans make sound waves by using their voice.
• The human voice is also made by vibrations.
• The source of sound in humans is the vocal cords.
• Vocal cords 2 thin, elastic, bands of tissue
  that vibrate to produce sound.

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How do the vocal cords produce sound?

• Air from the lungs flows through the windpipe and
  into the voice box (where the vocal cords are).
• 2. Then the air pushes the vocal cords apart
  making them vibrate.
• 3. The vibrations create a series of sound waves
  that exit through your mouth.
• 4. The change of shape of the vocal cords
  changes the sound and its pitch.
• 5. If you cant talk because of a cold or
  laryngitis, it is because your vocal cords are
  swollen and inflamed.

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Communication tools that use sound

• Voice allows you to communicate with others.
• Morse Code code for numbers and letters using
  sound
• Sonar a device that sends sound waves through
  water to measure or find something.
• Animal sounds
• Musical instruments