Across
1
Icy body with a tail near the sun
4
Curved glass that refracts light
6
Form of thermal energy
7
Force that attracts objects together
8
Unit of energy
9
Naturally occurring inorganic solid
Down
1
Solid with repeating atomic pattern
2
Glass that splits light into spectrum
3
Tectonic landmass section
5
Preserved remains of ancient life