Across
1
The Red Planet
4
Solid with repeating atomic pattern
5
Nerve cell in the brain
8
Absolute temperature scale unit
Down
2
Disturbance that transfers energy
3
Curved glass that refracts light
6
Force that attracts objects together
7
Reddish electrical conductor
9
Gas form of a liquid
10
Icy body with a tail near the sun
11
Magnetic metallic element