Across
1
Fourth state of matter
2
Molten rock beneath Earth surface
5
Element found in all living things
6
Force that attracts objects together
7
Ball of burning gas in space
10
Chemical element in table salt
11
Tectonic landmass section
Down
2
Naturally occurring inorganic solid
3
Mass per unit volume
4
Substance with pH above 7
8
Positive particle in nucleus
9
Infectious microscopic agent
12
Preserved remains of ancient life