Across
1
Nerve cell in the brain
4
Substance with pH above 7
6
Blocking of light by a celestial body
Down
2
Form of thermal energy
3
Compound containing oxygen
5
The Red Planet
7
Unit of heredity
8
Second lightest element
Nerve cell in the brain
Substance with pH above 7
Blocking of light by a celestial body
Form of thermal energy
Compound containing oxygen
The Red Planet
Unit of heredity
Second lightest element