Across
1
The Red Planet
3
Push or pull on an object
4
Unit of heredity
5
Unit of electric potential
6
Unit of force
8
Reddish electrical conductor
9
Infectious microscopic agent
12
Blocking of light by a celestial body
Down
1
Tissue that contracts for movement
2
Center of an atom or cell
7
Positive particle in nucleus
10
Amplified beam of light
11
Tectonic landmass section
12
Biological catalyst