Across
1
Unit of heredity
3
Tissue that contracts for movement
4
Solid with repeating atomic pattern
6
Nerve cell in the brain
8
Force that attracts objects together
9
Absolute temperature scale unit
10
Positive particle in nucleus
Down
2
Mass per unit volume
3
Naturally occurring inorganic solid
4
Reddish electrical conductor
5
Hottest planet in solar system
7
Disturbance that transfers energy