Across
1
Blocking of light by a celestial body
5
Hottest planet in solar system
6
Center of an atom or cell
11
Precious yellow metallic element
Down
2
Mass per unit volume
3
Unit of energy
4
Absolute temperature scale unit
7
Basic unit of life
8
Nerve cell in the brain
9
Substance with pH above 7
10
Tissue that contracts for movement