The speed of sound is directly affected by the temperature of the medium. The hotter the
medium the 1___________ the sound travels. Heat, just like sound, is a form of kinetic energy.
At higher temperatures, particles have 2___________ energy (kinetic) and thus, vibrate
3_____________. And when particles vibrate faster, there will be 4___________collisions per
unit time. With more collisions per unit time, 5_____________is transferred more efficiently
resulting in sound traveling quickly. At 0 o C, the speed of sound in air is 6______________
m/s. The speed of sound is dependent on temperature of the medium where an increase is
observed with an 7____________in temperature. Specifically, the speed of sound increases
by 8__________m/s with every increase of 1.0OC On the other hand, when sound propagates
in air where the temperature changes with altitude, sound bends towards the 9_______ region.
In this case, refraction happens. The refraction is due to the different refractive indices of air
because of the difference in 10___________.​