Across
1
Unit of force
2
Compound containing oxygen
4
Precious yellow metallic element
6
Unit of energy
7
Amplified beam of light
8
Glass that splits light into spectrum
Down
1
Nerve cell in the brain
2
Path of a planet around the sun
3
Tissue that contracts for movement
5
Curved glass that refracts light
9
Icy body with a tail near the sun