__1. the distance of a crest or trough
from the midpoint of a wave.
__2. the distance from a Crest to the next
Crest or a trough to the next trough.
__3.the number of Waves or vibrations produced per second.
__4. the time it takes a wave to travel a distance equal to a wavelength
__5. the distance traveled by a wave in one period

A. amplitude
B. frequency
C.period
D. trough
E. wave speed
F. wavelength​