Across
1
Particle of light
3
Path of a planet around the sun
5
Amplified beam of light
7
Unit of energy
Down
2
Solid with repeating atomic pattern
4
Second lightest element
6
Unit of heredity
8
Form of thermal energy
Particle of light
Path of a planet around the sun
Amplified beam of light
Unit of energy
Solid with repeating atomic pattern
Second lightest element
Unit of heredity
Form of thermal energy