Across
1
Group of similar cells
2
Particle of light
4
Element found in all living things
5
Path of a planet around the sun
Down
2
Glass that splits light into spectrum
3
Nerve cell in the brain
6
Disturbance that transfers energy
7
Unit of power
Group of similar cells
Particle of light
Element found in all living things
Path of a planet around the sun
Glass that splits light into spectrum
Nerve cell in the brain
Disturbance that transfers energy
Unit of power