Across
1
Biological catalyst
4
Absolute temperature scale unit
5
Element found in all living things
7
Unit of electric potential
10
Measure of matter in an object
11
Reddish electrical conductor
Down
2
Naturally occurring inorganic solid
3
Disturbance that transfers energy
6
Mass per unit volume
8
Fourth state of matter
9
Curved glass that refracts light
12
Blocking of light by a celestial body