Across
1
Curved glass that refracts light
2
Reddish electrical conductor
3
Molten rock beneath Earth surface
4
Gas form of a liquid
9
Hottest planet in solar system
Down
2
Solid with repeating atomic pattern
3
The Red Planet
5
Our home planet
6
Glass that splits light into spectrum
7
Precious yellow metallic element
8
Unit of power
10
Nerve cell in the brain