Across
1
Natural satellite of Earth
3
Curved glass that refracts light
5
Fourth state of matter
7
Molten rock beneath Earth surface
9
Ball of burning gas in space
Down
1
The Red Planet
2
Unit of heredity
4
Disturbance that transfers energy
6
Nerve cell in the brain
8
Unit of electric potential
10
Solid with repeating atomic pattern
11
Hottest planet in solar system