Across
1
Curved glass that refracts light
3
Naturally occurring inorganic solid
6
Tissue that contracts for movement
7
Blocking of light by a celestial body
10
Reddish electrical conductor
Down
2
Group of similar cells
4
Icy body with a tail near the sun
5
Fourth state of matter
8
Unit of energy
9
Form of thermal energy
11
Solid with repeating atomic pattern