Across
1
Our home planet
4
Amplified beam of light
5
Natural satellite of Earth
8
Center of an atom or cell
9
Second lightest element
Down
2
Absolute temperature scale unit
3
Naturally occurring inorganic solid
6
Reddish electrical conductor
7
Magnetic metallic element
10
Disturbance that transfers energy
11
Unit of electric potential
12
Chemical element in table salt