| A | B |
|---|
| reflection | light energy that bounces off objects |
| refraction | the bending of light rays |
| lens | a piece of clear material that bends, or refracts, light rays passing through it |
| corrective lenses | eyeglasses or contacts |
| A convex lens... | ...makes nearby objects look larger |
| Examples of convex lenses include... | glasses, contacts, movie projectors |
| concave lens | a lens that bends light rays outward just enough to make distant objects seem closer |
| compression | molecules squeezed together as sound moves forward |
| rarefaction | when the pressure on the molecules drops after the first compression passes |
| pitch | a characteristic of sound determined by the speed with which sound waves move |
| volume | the loudness of a sound |
| sound conductors | materials that carry sound waves |
| sound insulators | materials that don't carry sound waves |
| Parts of the eye include... | ...the iris, the cornea and the retina |
| Parts of the ear include... | ...the cochlea, hair cells, and stirrup |
