Across
1
Glass that splits light into spectrum
3
Gas form of a liquid
6
Unit of heredity
7
Measure of matter in an object
9
Fourth state of matter
10
Gas essential for breathing
Down
2
Solid with repeating atomic pattern
4
Amplified beam of light
5
Compound containing oxygen
8
Second lightest element
11
Form of thermal energy
12
Reddish electrical conductor