Across
1
Form of thermal energy
3
Disturbance that transfers energy
4
Particle of light
5
Curved glass that refracts light
6
Naturally occurring inorganic solid
Down
1
Second lightest element
2
Group of similar cells
3
Unit of power
7
Unit of force
Form of thermal energy
Disturbance that transfers energy
Particle of light
Curved glass that refracts light
Naturally occurring inorganic solid
Second lightest element
Group of similar cells
Unit of power
Unit of force