SUBJECT : SCIENCE       BY MS. naila anjum
Unit :10           Sound
Overview       • The Facts of Sound• Examples of objects produces sound       • The Ear and Sound       • Sound Vocabulary...
The FactsSound …1. Is a form of energy produced &  transmitted by vibrating matter2. Travels in waves3. Travels more quick...
Kinds of sounds1. Musical sound: Musical sound results when regular  vibrations of the voice or a musical instrument are  ...
Examples of things which   produces sounds
The Ear• Sound is carried to our ears through  vibrating air molecules.• Our ears take in sound waves & turn them  into si...
Vibration- Back and forth movement of molecules of  matter- For example,
Compression- Where molecules are being pressed  together as the sound waves move  through matter- For example,  - a wave t...
Sound Waves- Alternating areas of high & low pressure  in the air- ALL sound is carried through matter as  sound waves- So...
Wavelength & Frequency- Wavelength is the distance between one  part of a wave and the same part of the  next wave- Freque...
Pitch• A measure of how high or low a sound is• Pitch depends on the frequency of a sound wave• For example,       - Low p...
Reflection of sound- An instrument that uses reflected sound  waves to find underwater objects- For example,              ...
How sound waves reflected?
What is echolocation?
Sound and Instruments- Instruments can be played at different  pitches by changing lengths of different  parts.- For examp...
The End
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Presentation of sound unit 10

  1. 1. SUBJECT : SCIENCE BY MS. naila anjum
  2. 2. Unit :10 Sound
  3. 3. Overview • The Facts of Sound• Examples of objects produces sound • The Ear and Sound • Sound Vocabulary • Musical Instruments and Sound
  4. 4. The FactsSound …1. Is a form of energy produced & transmitted by vibrating matter2. Travels in waves3. Travels more quickly through solids than liquids or gases
  5. 5. Kinds of sounds1. Musical sound: Musical sound results when regular vibrations of the voice or a musical instrument are produced.2. Noise sound: Noise results when irregular vibrations are made at irregular times.
  6. 6. Examples of things which produces sounds
  7. 7. The Ear• Sound is carried to our ears through vibrating air molecules.• Our ears take in sound waves & turn them into signals that go to our brains.• Sound waves move through 3 parts of the ear; outer ear, middle ear, & inner ear. Middle Ear
  8. 8. Vibration- Back and forth movement of molecules of matter- For example,
  9. 9. Compression- Where molecules are being pressed together as the sound waves move through matter- For example, - a wave travels through the springs just like sound waves travel through the air - the places where the springs are close together are like compressions in the air.
  10. 10. Sound Waves- Alternating areas of high & low pressure in the air- ALL sound is carried through matter as sound waves- Sound waves move out in ALL directions from a vibrating object
  11. 11. Wavelength & Frequency- Wavelength is the distance between one part of a wave and the same part of the next wave- Frequency is the number of waves moving past a point in one second
  12. 12. Pitch• A measure of how high or low a sound is• Pitch depends on the frequency of a sound wave• For example, - Low pitch - High pitch - Low frequency - High frequency - Longer wavelength - Shorter wavelength
  13. 13. Reflection of sound- An instrument that uses reflected sound waves to find underwater objects- For example, Humans use sonar to locate or map objectsAnimals use sonar or echo location to find theirprey; these sounds have such a high pitch orfrequency that the human ear cannot hear
  14. 14. How sound waves reflected?
  15. 15. What is echolocation?
  16. 16. Sound and Instruments- Instruments can be played at different pitches by changing lengths of different parts.- For example,- Another way to make different pitches is to change the thickness of the material that vibrates.- For example, A trombone’s mute absorbs some of the sound waves produced, thus producing a softer note when played.
  17. 17. The End

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