Unit-4: sounds
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Unit-4: sounds
04.28.2020
09:00:19
Science/ grade 4- Today’s topic for revision- woodwind instruments- learner’s book- pages 68 and 69.
Main points-
The pipe of a wind instrument traps air.
Blowing across the top of the pipe makes the air vibrate, which makes a sound.
The longer the column of air is, the lower the pitch of the sound.
No homework.
09:00:19
Science/ grade 4- Today’s topic for revision- woodwind instruments- learner’s book- pages 68 and 69.
Main points-
The pipe of a wind instrument traps air.
Blowing across the top of the pipe makes the air vibrate, which makes a sound.
The longer the column of air is, the lower the pitch of the sound.
No homework.
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تاريخ التسجيل : 15/09/2018
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