Across
1
Glass that splits light into spectrum
4
Tissue that contracts for movement
5
Unit of force
6
Compound containing oxygen
8
Unit of electric potential
9
Chemical element in table salt
12
Particle of light
13
Measure of matter in an object
Down
2
Icy body with a tail near the sun
3
Amplified beam of light
4
Molten rock beneath Earth surface
7
Center of an atom or cell
10
Preserved remains of ancient life
11
Biological catalyst
14
Disturbance that transfers energy