Across
1
Tectonic landmass section
3
Magnetic metallic element
5
Fourth state of matter
6
Absolute temperature scale unit
9
Compound containing oxygen
11
Nerve cell in the brain
12
Force that attracts objects together
Down
2
Amplified beam of light
4
Form of thermal energy
7
Gas essential for breathing
8
Hottest planet in solar system
10
Gas form of a liquid