Across
1
Amplified beam of light
5
Fourth state of matter
6
Push or pull on an object
7
Second lightest element
9
Unit of electric potential
12
Natural satellite of Earth
Down
2
Blocking of light by a celestial body
3
Hottest planet in solar system
4
Path of a planet around the sun
8
Solid with repeating atomic pattern
10
Substance with pH below 7
11
Center of an atom or cell