Across
1
Gas form of a liquid
3
Path of a planet around the sun
5
Glass that splits light into spectrum
6
Preserved remains of ancient life
8
Mass per unit volume
Down
1
Infectious microscopic agent
2
Magnetic metallic element
4
Amplified beam of light
5
Tectonic landmass section
7
Unit of power
9
Our home planet
10
Particle of light