The second graders are busy exploring the properties of sound and learning about the parts of the ear. They have done many experiments to see how sound waves travel. They held a clock at the end of a yardstick and listened to see if the sound traveled through the wood. They struck a tuning fork to see what happened if you held a ping pong ball on a string and let the tuning fork touch it or if you put the tip of the tuning fork in a bowl of water. They discovered that sound travels through solids, liquids, and gasses and without vibrations there is no sound. The children also brought in sounds for us to guess and even learned to sign their names using the manual alphabet.