Across
1
Naturally occurring inorganic solid
4
Compound containing oxygen
7
Magnetic metallic element
8
Glass that splits light into spectrum
9
Amplified beam of light
11
Path of a planet around the sun
Down
2
Unit of energy
3
Center of an atom or cell
5
Substance with pH below 7
6
Chemical element in table salt
10
Absolute temperature scale unit
12
Unit of electric potential