Across
1
Push or pull on an object
3
Disturbance that transfers energy
4
Unit of force
5
Positive particle in nucleus
8
Infectious microscopic agent
9
Substance with pH below 7
12
Measure of matter in an object
Down
2
Blocking of light by a celestial body
4
Nerve cell in the brain
6
Preserved remains of ancient life
7
Fourth state of matter
10
Compound containing oxygen
11
Tectonic landmass section