Across
1
Unit of electric potential
4
Molten rock beneath Earth surface
6
Element found in all living things
7
Compound containing oxygen
9
Disturbance that transfers energy
10
Blocking of light by a celestial body
Down
2
Absolute temperature scale unit
3
Fourth state of matter
5
Second lightest element
6
Reddish electrical conductor
8
Precious yellow metallic element
11
Center of an atom or cell
12
Positive particle in nucleus
13
Smallest unit of an element