Across
1
Preserved remains of ancient life
4
Smallest unit of an element
6
Unit of force
10
Gas form of a liquid
11
Curved glass that refracts light
Down
1
Push or pull on an object
2
Glass that splits light into spectrum
3
Force that attracts objects together
5
Tissue that contracts for movement
7
Form of thermal energy
8
Positive particle in nucleus
9
Disturbance that transfers energy