Two students grab a slinky and start waving it up and down. A third student counts the number of waves that pass by every second and measures the distance between the wave peaks. This data is recorded and a graph is made to show the results. In looking at the graph, what wave property is remaining constant over the experiment?
A)amplitude
B)energy
C)period
D)velocity

Identify the characteristic of the transverse wave that halved from wave A (black) to wave B (green).
A)amplitude
B)crest
C)trough
D)wavelength