Across
1
Element found in all living things
2
Glass that splits light into spectrum
5
Unit of electric potential
6
Chemical element in table salt
7
Icy body with a tail near the sun
11
Unit of energy
12
Push or pull on an object
Down
2
Particle of light
3
Tissue that contracts for movement
4
Ball of burning gas in space
7
Basic unit of life
8
Naturally occurring inorganic solid
9
Path of a planet around the sun
10
Curved glass that refracts light