Big Idea: Sound travels as one of two kinds of waves - compression and transverse. Here we are using a big "slinky" to see the waves:
Using singing rods we attempted to create a demonstration of how compression waves can be amplified in a metal rod by stroking the rod with our fingers and a little pine sap to set up a standing wave. We weren't successful, however, and will need some more practice to make it work!
Big Idea: Sound waves can be transmitted through solids, liquids and gases. We found that sound was loudest and clearest through a solid (sugar crystals) vs air and water.
Then we discovered that you can make a very LOUD GONG sound by using a metal spoon to tap a wire hanger attached with string to a paper cup at your ear.
Big Idea: Playing with sound can very entertaining! Especially using soup-can telephones:
and boom whackers! This is our rendition of "Mary Had a Little Lamb":
And then a little snuggle to finish off the afternoon ....