Across
1
Tissue that contracts for movement
4
Unit of electric potential
5
Blocking of light by a celestial body
8
Solid with repeating atomic pattern
9
The Red Planet
10
Biological catalyst
12
Particle of light
Down
2
Compound containing oxygen
3
Reddish electrical conductor
6
Center of an atom or cell
7
Path of a planet around the sun
9
Molten rock beneath Earth surface
11
Curved glass that refracts light