Across
1
Measure of matter in an object
2
Nerve cell in the brain
3
Substance with pH below 7
6
Our home planet
9
Gas form of a liquid
10
Glass that splits light into spectrum
11
Compound containing oxygen
Down
1
Tissue that contracts for movement
4
Preserved remains of ancient life
5
Reddish electrical conductor
7
Molten rock beneath Earth surface
8
Solid with repeating atomic pattern
12
Group of similar cells