Across
1
Preserved remains of ancient life
5
Tectonic landmass section
6
Natural satellite of Earth
10
Chemical element in table salt
11
Tissue that contracts for movement
Down
2
Compound containing oxygen
3
Ball of burning gas in space
4
Second lightest element
7
Disturbance that transfers energy
8
Element found in all living things
9
Infectious microscopic agent
12
Amplified beam of light