Across
1
Amplified beam of light
4
Icy body with a tail near the sun
5
Group of similar cells
6
Positive particle in nucleus
7
Compound containing oxygen
10
Disturbance that transfers energy
11
Naturally occurring inorganic solid
Down
2
Solid with repeating atomic pattern
3
Ball of burning gas in space
4
Element found in all living things
8
Chemical element in table salt
9
Blocking of light by a celestial body