Across
1
Fourth state of matter
2
Reddish electrical conductor
5
Infectious microscopic agent
6
Ball of burning gas in space
7
Unit of heredity
10
Preserved remains of ancient life
11
Measure of matter in an object
Down
2
Icy body with a tail near the sun
3
Form of thermal energy
4
Blocking of light by a celestial body
8
Tectonic landmass section
9
Amplified beam of light