Ch. 14 Science

Vocabulary Preview

compression

compression

• A compression is the party of the sound wave where the particles are bunched together.

frequency

frequency

• The frequency of a wave is the number of waves that pass a point in a certain amount of time.

wavelength

wavelength

• A wavelength is the distance between a point on one wave and a similar point on the next wave.

pitch

pitch

• A pitch is what makes a sound seem high or low.

reflection

reflection

• Reflection occurs when light rays bounce, or reflect, from a surface back to our eyes.

transparent

transparent

• If something is transparent, light rays pass through it. You can clearly see what is on the other side.

translucent

translucent

• Materials that let some light through but scatter other rays are translucent. The other side looks blurry.

opaque

opaque

• Materials that do not let light pass through are opaque. You cannot see through it.

refraction

refraction

• When light passes through and changes direction.