Across
1
Ball of burning gas in space
2
Hottest planet in solar system
4
Amplified beam of light
5
Path of a planet around the sun
7
Particle of light
8
Naturally occurring inorganic solid
Down
2
Infectious microscopic agent
3
Element found in all living things
6
Molten rock beneath Earth surface
7
Tectonic landmass section
9
Biological catalyst