Across
1
Path of a planet around the sun
3
Disturbance that transfers energy
5
Tectonic landmass section
7
Mass per unit volume
9
Naturally occurring inorganic solid
11
Chemical element in table salt
Down
2
Unit of energy
4
The Red Planet
5
Particle of light
6
Reddish electrical conductor
8
Unit of power
10
Absolute temperature scale unit