Across
1
Glass that splits light into spectrum
3
Preserved remains of ancient life
4
Unit of force
6
Positive particle in nucleus
9
Push or pull on an object
10
Icy body with a tail near the sun
11
Basic unit of life
13
Disturbance that transfers energy
Down
2
Compound containing oxygen
5
Natural satellite of Earth
7
Group of similar cells
8
Curved glass that refracts light
10
Solid with repeating atomic pattern
12
Biological catalyst