Across
1
Disturbance that transfers energy
3
The Red Planet
4
Curved glass that refracts light
5
Substance with pH above 7
6
Solid with repeating atomic pattern
8
Mass per unit volume
Down
2
Molten rock beneath Earth surface
3
Tissue that contracts for movement
7
Form of thermal energy
9
Unit of energy
10
Reddish electrical conductor
11
Precious yellow metallic element
12
Hottest planet in solar system