Across
1
Unit of force
2
The Red Planet
4
Absolute temperature scale unit
5
Unit of electric potential
7
Preserved remains of ancient life
9
Ball of burning gas in space
11
Glass that splits light into spectrum
12
Blocking of light by a celestial body
Down
1
Center of an atom or cell
2
Tissue that contracts for movement
3
Push or pull on an object
6
Disturbance that transfers energy
8
Naturally occurring inorganic solid
10
Reddish electrical conductor