Across
1
Amplified beam of light
4
Curved glass that refracts light
8
Tissue that contracts for movement
9
Icy body with a tail near the sun
10
Tectonic landmass section
Down
2
Unit of energy
3
Center of an atom or cell
5
Unit of electric potential
6
Measure of matter in an object
7
Path of a planet around the sun