Across
1
Particle of light
3
Measure of matter in an object
4
Naturally occurring inorganic solid
5
Hottest planet in solar system
7
Substance with pH below 7
11
Preserved remains of ancient life
Down
1
Fourth state of matter
2
Force that attracts objects together
6
Chemical element in table salt
8
Nerve cell in the brain
9
Gas form of a liquid
10
Magnetic metallic element