Across
1
Tectonic landmass section
4
Nerve cell in the brain
5
Particle of light
6
Chemical element in table salt
9
Blocking of light by a celestial body
10
Center of an atom or cell
Down
2
Gas essential for breathing
3
Curved glass that refracts light
5
Glass that splits light into spectrum
7
Disturbance that transfers energy
8
Preserved remains of ancient life