Across
1
Particle of light
6
Tectonic landmass section
7
Unit of power
11
Unit of electric potential
Down
1
Positive particle in nucleus
2
Absolute temperature scale unit
3
Gas essential for breathing
4
Our home planet
5
Form of thermal energy
8
Path of a planet around the sun
9
Smallest unit of an element
10
Measure of matter in an object
12
Reddish electrical conductor