Across
1
Unit of power
3
Absolute temperature scale unit
7
Blocking of light by a celestial body
8
Preserved remains of ancient life
9
Ball of burning gas in space
11
Glass that splits light into spectrum
12
Chemical element in table salt
Down
2
Element found in all living things
4
Particle of light
5
Infectious microscopic agent
6
Tissue that contracts for movement
10
Reddish electrical conductor