We talked about four types of waves: Longitudinal, Transverse, Electromagnetic, and Mechanical. In physics, a wave is a disturbance that travels through space and matter transferring energy from one place to another. When studying waves it's important to remember that they transfer energy, not matter.
Sound is a type of energy made by vibrations. When any object vibrates, it causes movement in the air particles. These particles bump into the particles close to them, which makes them vibrate too causing them to bump into more air particles. This movement, called sound waves, keeps going until they run out of energy.
We had fun watching a candy wave machine and a slinky demonstrate how the vibrations ripple through and bounce back.
Then we played with the Vortex Cannon. We were all amazed with the Vortex Air Cannon. It was fun to see the cups get blown over from across the room. Vortex cannons create a 'vortex' or ring of air that blows out as the air on the inside of the cannon is moving faster than the outside air.
We finished up the lesson by creating a mini vortex cannon to take home!
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