Fill in the blanks:
a wave that moves the matter it passes through up and down is a and one that moves the matter forward and back is a
choices:
a) transverse wave
b) amplitude
c) reflection
d) longitudinal wave

A wave that moves the matter it passes through up and down is a A) Transverse Wave, and one that moves the matter forward and back is a D) Longitudinal Wave. 

There are two main types of waves, transverse and longitudinal, and I remember them by thinking that the longitudinal wave moves the matter in a longitudinal way (so forward and backward), and the transverse is the wave that moves the matter up and down — across (since transverse can mean "across") the wave. 

Hope this helped!! xx

You know how the first one if filled up like the objects do the same but with the other categories

6because i no yea yea