 | Term | Definition |
| |
compression |
the part of the wave where particles are closest together |
| |
frequency |
the number of times a wave makes a complete cycle in a second |
| |
wavelength |
distance between one point on a wave to the next similar point on a wave |
| |
pitch |
a measure of whether a sound seems high or low, determined by the sound's frequency |
| |
reflection |
the bouncing back of a wave off an object's surface |
| |
absorption |
the taking in of light energy by an object |
| |
transparent |
describes materials that let nearly all the light rays that hit them pass through |
| |
translucent |
describes materials that let some light rays pass through but scatter some of the other rays |
| |
opaque |
describes materials that do not let any light pass through them |
| |
refraction |
bending of light caused by the change of speed that occurs when light rays pass from one transparent medium to another |
| |
sound |
a form of energy that travels in waves |
| |
sound waves |
travel outwards in all directions from the source |
| |
sound energy and light travel |
through solids, liquids, and gases |
| |
transverse waves |
particles move up and down and at right angles to a source |
| |
longitudinal waves |
particles move side and parallel to a source |
| |
echo |
reflected sound |
| |
solid |
sound waves travel most quickly through these and light travels the slowest |
| |
gas |
sound waves travel the slowest through these and light travels the quickest |
