Across
1
Center of an atom or cell
5
Amplified beam of light
6
Curved glass that refracts light
7
Group of similar cells
9
Particle of light
Down
1
Nerve cell in the brain
2
Blocking of light by a celestial body
3
Tissue that contracts for movement
4
The Red Planet
8
Solid with repeating atomic pattern
10
Path of a planet around the sun