Across
1
Chemical element in table salt
2
Form of thermal energy
4
Path of a planet around the sun
6
Particle of light
7
Tissue that contracts for movement
8
Hottest planet in solar system
9
Unit of power
Down
2
Second lightest element
3
Group of similar cells
5
The Red Planet
6
Positive particle in nucleus
7
Molten rock beneath Earth surface
10
Disturbance that transfers energy
11
Tectonic landmass section