Across
1
Amplified beam of light
5
Glass that splits light into spectrum
8
Element found in all living things
Down
2
Preserved remains of ancient life
3
Infectious microscopic agent
4
Gas form of a liquid
6
Substance with pH below 7
7
Smallest unit of an element
9
Our home planet
10
Nerve cell in the brain
11
Ball of burning gas in space