Across
1
Infectious microscopic agent
2
Compound containing oxygen
3
Form of thermal energy
5
Disturbance that transfers energy
6
Preserved remains of ancient life
Down
1
Hottest planet in solar system
3
Second lightest element
4
Magnetic metallic element
7
Path of a planet around the sun
8
Substance with pH below 7
9
Naturally occurring inorganic solid