Across
1
Blocking of light by a celestial body
5
Unit of heredity
6
Second lightest element
7
Precious yellow metallic element
8
Absolute temperature scale unit
10
Unit of power
12
Smallest unit of an element
Down
2
Fourth state of matter
3
Compound containing oxygen
4
Hottest planet in solar system
6
Form of thermal energy
9
Substance with pH above 7
11
Unit of energy