Knowing that sound is caused by vibrations, third graders are exploring various properties of sound. Our first focus will be on volume. How do the vibrations change when the volume gets louder? Softer? We've introduced two new technologies to help us see the differences in volume--a tone generator (with beans on top) and a door fiddle (made of string).
Sounds are all around us, but what causes them? Third graders continue to explore sound, looking for evidence of vibrations. Can you feel the vibrations when you hear a sound? Can you see the vibrations when you hear a sound? Since sound comes from many different sources, third graders are looking for ways in which they can see or feel the vibrations of sound!