A sound is made when an object vibrates. Class 3 investigated lots of different vibrations last week including rice on drums, tuning forks in water and coathanger bells!
This week we investigated pitch - how high or low a sound is. We thought that the longer the object that was vibrating, the lower the sound would be. We investigated this in a particularly screechy way using cups, string and wet paper towels. We investigated different sizes of container, different types of string and different lengths of string.
Please ask us what we found out.