Across
1
Unit of electric potential
2
Push or pull on an object
3
Nerve cell in the brain
4
Curved glass that refracts light
8
Group of similar cells
9
Disturbance that transfers energy
10
Our home planet
Down
1
Hottest planet in solar system
5
Precious yellow metallic element
6
Blocking of light by a celestial body
7
Positive particle in nucleus
11
Center of an atom or cell