Across
1
Unit of heredity
2
Glass that splits light into spectrum
3
Solid with repeating atomic pattern
6
Unit of force
7
Nerve cell in the brain
9
Amplified beam of light
Down
2
Particle of light
3
Element found in all living things
4
Blocking of light by a celestial body
5
Mass per unit volume
8
Form of thermal energy
10
Biological catalyst