Across
1
Tissue that contracts for movement
4
Blocking of light by a celestial body
6
Hottest planet in solar system
8
Compound containing oxygen
9
Solid with repeating atomic pattern
10
Substance with pH above 7
11
Absolute temperature scale unit
Down
2
Ball of burning gas in space
3
Nerve cell in the brain
4
Biological catalyst
5
Second lightest element
7
Curved glass that refracts light