In science class, you listen to the sound of a tuning fork after it is hit against a cork. When you place the tuning fork to one
end of a piece of wood and your ear to the other, you notice
that the sound becomes high pitched. What happened to the
sound waves as they went through the wood?
A. They slowed, due to a high pitch echo
B. They slowed, due to more matter in the wood
C. They sped up, creating a higher frequency
D. They sped up, creating a higher wavelength