Across
1
Particle of light
4
Unit of heredity
5
Solid with repeating atomic pattern
7
Blocking of light by a celestial body
8
Tectonic landmass section
9
Force that attracts objects together
Down
2
Compound containing oxygen
3
Curved glass that refracts light
6
Gas form of a liquid
10
Absolute temperature scale unit
11
Tissue that contracts for movement