Across
1
Absolute temperature scale unit
4
Center of an atom or cell
8
Push or pull on an object
9
Amplified beam of light
11
Nerve cell in the brain
12
Chemical element in table salt
Down
2
Fourth state of matter
3
Magnetic metallic element
5
Infectious microscopic agent
6
Natural satellite of Earth
7
Blocking of light by a celestial body
9
Curved glass that refracts light
10
Reddish electrical conductor