Across
1
Particle of light
4
Ball of burning gas in space
5
Preserved remains of ancient life
6
Form of thermal energy
Down
1
Positive particle in nucleus
2
Curved glass that refracts light
3
Unit of force
7
Unit of electric potential
Particle of light
Ball of burning gas in space
Preserved remains of ancient life
Form of thermal energy
Positive particle in nucleus
Curved glass that refracts light
Unit of force
Unit of electric potential