1
When a material let's electricity trhough
2
When a material let's heat pass trough
3
If an object let's light go trough
4
When a material is fragile.
5
When a material is difficult to scratch
6
The equation of mass + volume
7
The amount of space an object takes up
8
If it occupies space and weights it's this
9
The amount of matter a material has
