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JSS3: BASIC SCIENCE - 2ND TERM

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  1. Light Energy | Week 1
    2 Topics
  2. Reflection of Light | Week 2
    5 Topics
    |
    1 Quiz
  3. Sound Energy | Week 3
    4 Topics
  4. Sound Energy - Echoes, Hearing | Week 4
    2 Topics
    |
    1 Quiz
  5. Electrical Energy - Concept of Electrical Flow | Week 5
    2 Topics
  6. Arrangement of Resistors | Week 6
    3 Topics
  7. Electrical Meter Reading and Billing | Week 7
    2 Topics
    |
    1 Quiz
  8. Magnetism | Week 8
    2 Topics
  9. Laws of Magnetism | Week 9
    4 Topics
    |
    1 Quiz
  10. Radioactivity | Week 10
    5 Topics
    |
    1 Quiz



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Sound is produced by bodies that vibrate or shake, for example, if a vibrating tuning fork is placed over a column of air, the fork sets the air into vibration, and sound is transmitted through matter such as air or water.

The matter through which sound is transmitted is called a Medium.  Sound is transmitted through a medium in the form of vibrations or waves.

sound wave
tuning fork icon vector 21679260

A tuning fork is a small steel instrument, which is used to tune instruments, by striking it against something to produce a note of fixed musical pitch. The sound they make is totally pure.

The pitch of a sound depends on the frequency while the loudness of a sound depends on the amplitude of sound waves.

Graphs of sound waves20151209 v2 e1642894252538

The timbre or quality of a sound depends on its waveform, which varies with the number of overtones, or harmonics, that are present, their frequencies, and their relative intensities.

Some objects that produce sound are:

  1. A violin plucked.
  2. Human beings vocal cords while speaking.
  3. A vibrating tuning fork.
  4. A drum beaten with a stick.
  5. A guitar.
Guitar
Guitar.

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