Across
1
Disturbance that transfers energy
4
Naturally occurring inorganic solid
6
Magnetic metallic element
8
Curved glass that refracts light
9
Infectious microscopic agent
12
Gas essential for breathing
13
Precious yellow metallic element
Down
2
The Red Planet
3
Compound containing oxygen
5
Second lightest element
7
Tissue that contracts for movement
10
Substance with pH below 7
11
Tectonic landmass section