Across
1
Tectonic landmass section
2
Icy body with a tail near the sun
5
Natural satellite of Earth
7
Disturbance that transfers energy
9
Absolute temperature scale unit
Down
2
Reddish electrical conductor
3
Smallest unit of an element
4
Form of thermal energy
6
Gas essential for breathing
8
Center of an atom or cell
10
Unit of force
11
Unit of electric potential