Basic science JSS3 Second term

Sub-theme: learning about our environment

WEEK 5

Sound Energy I

Performance Objectives

The student should be able to:

1. Explain how sounds are produced from a vibrating medium.

Content

Sound waves

A sound wave is a transfer of energy as it travels away from a vibrating source. Sound waves are formed when a vibrating object causes the surrounding medium to vibrate. A medium is a material (solid, liquid, or gas) which a wave travels through. As sound waves move through a medium the particles vibrate forwards and backward. A sound’s volume, how loud or soft it is, depends on the sound wave. The more energy put into making a sound or a sound wave, the louder the volume will be. The farther a sound wave travels, the more it spreads; this makes it more difficult for us to hear a sound. So the nearer you are to a.... View More