Across
1
Measure of matter in an object
4
Blocking of light by a celestial body
5
Fourth state of matter
8
Glass that splits light into spectrum
Down
1
Tissue that contracts for movement
2
Molten rock beneath Earth surface
3
Curved glass that refracts light
6
Group of similar cells
7
Unit of energy
9
Smallest unit of an element
10
Force that attracts objects together