Stringed instruments was the topic of investigation for Ingrid (Grade 6 girl). Her topic was initially "Cell duplication" until Session 8.
Prior knowledge video
My topic is strings, and, umm, I know nothing about strings on the piano. And I'm probably going to do most of my research on strings on a piano more than a guitar.
Completed explanatory animation
Stringed instruments such as piano and guitar have multiple strings but the science behind the pitch of the notes is the same for each string.
The pitch of a musical note is measured by its frequency which is the number of vibrations per second.
The variables of length, tension and mass combine to give each note it’s frequency.
The longer the string, the lower the frequency. The shorter the string the higher the frequency.
The looser the string, the lower the frequency. The tighter the string the higher the frequency.
The thicker the string, the lower the frequency. The thinner the string the higher the frequency.
My original animation was talking about "Cell duplication" but more than half way through researching the topic, I realised that it would be too hard and if we did animate it, it would just be a copy of something that we had already seen.
The formula itself is quite complicated but once you understand it and you've read over it a few times it's actually quite simple.
I realised it was a complicated formula but the variables are quite easy to understand.