Across
1
Blocking of light by a celestial body
4
Gas form of a liquid
6
Amplified beam of light
7
Force that attracts objects together
8
Substance with pH below 7
9
Preserved remains of ancient life
Down
2
Group of similar cells
3
The Red Planet
5
Solid with repeating atomic pattern
10
Glass that splits light into spectrum
11
Gas essential for breathing