Across
1
Absolute temperature scale unit
4
Blocking of light by a celestial body
5
Fourth state of matter
8
Unit of electric potential
10
Hottest planet in solar system
Down
2
Basic unit of life
3
Second lightest element
6
Chemical element in table salt
7
Reddish electrical conductor
9
Icy body with a tail near the sun
11
Substance with pH below 7