Across
1
Unit of electric potential
3
Smallest unit of an element
4
Solid with repeating atomic pattern
6
Biological catalyst
8
Reddish electrical conductor
10
Substance with pH below 7
11
Preserved remains of ancient life
Down
1
Hottest planet in solar system
2
Path of a planet around the sun
5
Second lightest element
6
Our home planet
7
Blocking of light by a celestial body
9
Gas form of a liquid