Student Guide (continued) Water
4.18
Concrete
0.88
Wood
1.80
Aluminum
0.90
Glass
0.84
Sand
0.83
Steel
0.49
Iron
0.44
Copper
0.38
Lead
0.16
Gold
0.13

I think this is right idk,

The displacement of a particle moving in a straight line is a vector defined as the change in its position. If the particle moves from the position x(t1) to the position x(t2), its displacement is x(t2)−x(t1) for the time interval [t1,t2]. The distance travelled by a particle is the 'actual distance' travelled.