Across
1
Absolute temperature scale unit
3
Solid with repeating atomic pattern
4
Amplified beam of light
6
Reddish electrical conductor
7
Particle of light
Down
2
Center of an atom or cell
5
Unit of energy
8
Fourth state of matter
9
Substance with pH above 7
10
Hottest planet in solar system
11
Biological catalyst
12
Force that attracts objects together