Across
1
Our home planet
5
Unit of power
6
Disturbance that transfers energy
7
Center of an atom or cell
12
Absolute temperature scale unit
Down
2
Unit of electric potential
3
The Red Planet
4
Form of thermal energy
8
Magnetic metallic element
9
Nerve cell in the brain
10
Path of a planet around the sun
11
Blocking of light by a celestial body