Across
1
Force that attracts objects together
3
Molten rock beneath Earth surface
4
Positive particle in nucleus
6
Element found in all living things
Down
2
Solid with repeating atomic pattern
4
Glass that splits light into spectrum
5
Naturally occurring inorganic solid
7
Magnetic metallic element
8
Substance with pH below 7
9
Amplified beam of light
10
Form of thermal energy