Across
1
Blocking of light by a celestial body
4
Molten rock beneath Earth surface
5
Unit of force
6
Amplified beam of light
8
Hottest planet in solar system
10
Absolute temperature scale unit
11
Infectious microscopic agent
Down
2
Element found in all living things
3
Chemical element in table salt
7
Center of an atom or cell
9
Solid with repeating atomic pattern
12
Substance with pH below 7