Across
1
Substance with pH below 7
4
Center of an atom or cell
6
Ball of burning gas in space
10
Blocking of light by a celestial body
Down
2
Magnetic metallic element
3
The Red Planet
5
Absolute temperature scale unit
6
Chemical element in table salt
7
Nerve cell in the brain
8
Precious yellow metallic element
9
Form of thermal energy