Chapter Six Sounds
Sounds • Sounds are vibrations that can travel through any material. • Sounds are made when objects vibrate. • The vibration makes the air around it vibrate, then the air vibrations enter your ear and you hear them as a sound. • Think about the word vibrate as wiggle • Check pupil book p. 126
• We cannot always see the vibrations, but if something is making a sound, some part of it is always vibrating. • We are a source of sound too • When we speak or sing the vocal cords in our voice box vibrate and make sounds. • To feel the vibrations put your hand on your throat and say ahhhh! • The voice box is part of our throat.
Pupil book p. 129 Exercise. 1 -Sounds are made when things or air vibrate. 2 - a) The cymbals. b) The wings of the bee. c) The vocal cords in the voice box. d) The metal tubes (pipes) of the wind chime.
Activity book p. 85 Things How did you make it produce sounds? Drum By hitting Rattle By shaking Whistle By blowing Cymbals By hitting Tambourine By shaking
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