Across
1
Disturbance that transfers energy
4
Glass that splits light into spectrum
6
Mass per unit volume
8
Center of an atom or cell
13
Magnetic metallic element
Down
2
Reddish electrical conductor
3
Ball of burning gas in space
5
Absolute temperature scale unit
7
Positive particle in nucleus
9
Solid with repeating atomic pattern
10
The Red Planet
11
Basic unit of life
12
Unit of heredity