Unit 9: Sound waves

Today we played with a bunch of beakers and tuning forks. We learned the idea of resonance which is an increase in amplitude of a wave by vibration caused by a force at the same frequency.  To go along with this idea, Mr. Blake showed us a video of the Takoma bridge from forty or fifty years ago. Along with resonance we learned about both reflection, or an amount of light, heat, or sound that is thrown back in such a way, and refraction, the bending of light, when light moves from one medium into another; change in the direction of waves as they pass from one medium to another; bending of the path of waves accompanied by a change in speed in wavelength of the waves.