Across
1
Infectious microscopic agent
4
Substance with pH below 7
5
Tissue that contracts for movement
7
Blocking of light by a celestial body
11
Push or pull on an object
Down
2
Substance with pH above 7
3
Disturbance that transfers energy
6
Nerve cell in the brain
8
Hottest planet in solar system
9
Preserved remains of ancient life
10
Center of an atom or cell