Across
1
Form of thermal energy
3
Amplified beam of light
6
Curved glass that refracts light
10
Icy body with a tail near the sun
11
Preserved remains of ancient life
Down
2
Basic unit of life
4
Substance with pH below 7
5
Solid with repeating atomic pattern
7
Positive particle in nucleus
8
Ball of burning gas in space
9
Path of a planet around the sun