Across
1
Mass per unit volume
4
Natural satellite of Earth
5
Tissue that contracts for movement
8
Icy body with a tail near the sun
11
Absolute temperature scale unit
Down
2
Solid with repeating atomic pattern
3
Unit of force
6
Reddish electrical conductor
7
Disturbance that transfers energy
9
Hottest planet in solar system
10
Particle of light