Across
1
Hottest planet in solar system
4
Unit of electric potential
5
Our home planet
7
Unit of energy
8
Nerve cell in the brain
9
Reddish electrical conductor
10
Center of an atom or cell
Down
2
Curved glass that refracts light
3
Fourth state of matter
5
Blocking of light by a celestial body
6
Tectonic landmass section