Across
1
Tectonic landmass section
4
Infectious microscopic agent
5
Path of a planet around the sun
6
Curved glass that refracts light
7
Substance with pH above 7
8
Magnetic metallic element
9
Element found in all living things
Down
2
The Red Planet
3
Mass per unit volume
4
Hottest planet in solar system
5
Compound containing oxygen
6
Amplified beam of light
10
Unit of electric potential