Across
1
Center of an atom or cell
2
Gas form of a liquid
6
Magnetic metallic element
7
Reddish electrical conductor
9
Tissue that contracts for movement
10
Blocking of light by a celestial body
Down
2
Infectious microscopic agent
3
Curved glass that refracts light
4
Particle of light
5
Substance with pH above 7
8
Path of a planet around the sun
11
Solid with repeating atomic pattern
12
Glass that splits light into spectrum