1. Refraction The bending of light depending on the density of a medium
When light travels from one medium to another
Light bends due to the temperature and density of a medium

2. Refracting explained
When medium densities and temps are different light refracts due to a speed change
Are molecules moving faster at 0 C or 100C?
What molecules move faster: solid liquid, or gas?

3. Imagine: Light must conform as a unit
Following a marching band director, and one person in the line goes into a thick mud puddle. As the person gets stuck and slows down the rest of the band line. To keep in uniform the band compensates and slowly bends to fit the angle of that person stuck in the mud until all are in the mud.

4. Light traveling through a prism
Write what you think will happen when light hits the solid:
Refracted light hits a more dense object, causing the light to refract and bend
This bend separates the colors in white light and make a rainbow