Across
1
The Red Planet
3
Disturbance that transfers energy
4
Center of an atom or cell
6
Reddish electrical conductor
9
Force that attracts objects together
10
Tissue that contracts for movement
Down
1
Measure of matter in an object
2
Fourth state of matter
5
Solid with repeating atomic pattern
7
Magnetic metallic element
8
Preserved remains of ancient life