Across
1
Second lightest element
3
Reddish electrical conductor
4
Solid with repeating atomic pattern
8
Disturbance that transfers energy
9
Infectious microscopic agent
10
Curved glass that refracts light
Down
2
Our home planet
5
Fourth state of matter
6
Gas essential for breathing
7
Tissue that contracts for movement
11
Magnetic metallic element
12
Unit of electric potential
13
Compound containing oxygen