Across
1
Natural satellite of Earth
4
Form of thermal energy
5
Solid with repeating atomic pattern
8
Group of similar cells
9
Gas essential for breathing
10
Chemical element in table salt
12
Element found in all living things
Down
2
Mass per unit volume
3
Unit of electric potential
6
Absolute temperature scale unit
7
Amplified beam of light
11
Reddish electrical conductor