Today, I would like to introduce you about my next week lesson. The last week I instructed my children to know Vibrations cause sound, In next week I will instruc them " Sound moves in wave"
The first of all I'll asked them with this answer " Can someone describe how the water moves at a beach?
Sound travel in waves too. Sound waves are visible to our eyes, but can be heard with our ears. I have a piece of scientific equipment it call "slinky" that can help us see sound waves by swing, And then I have a valunteer in the middle of the class and hold end of slinky and pull back the wave like a sound wave will happend to us.
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