Across
1
Glass that splits light into spectrum
2
Molten rock beneath Earth surface
4
Blocking of light by a celestial body
7
Natural satellite of Earth
9
Unit of energy
10
Center of an atom or cell
12
Unit of heredity
13
Ball of burning gas in space
14
Mass per unit volume
Down
2
Tissue that contracts for movement
3
Element found in all living things
5
Solid with repeating atomic pattern
6
Push or pull on an object
8
Amplified beam of light
11
Particle of light