Across
1
Gas form of a liquid
3
Tissue that contracts for movement
4
Magnetic metallic element
7
Nerve cell in the brain
8
Unit of power
9
Unit of electric potential
Down
2
Force that attracts objects together
3
The Red Planet
5
Element found in all living things
6
Positive particle in nucleus
10
Compound containing oxygen
11
Glass that splits light into spectrum
12
Center of an atom or cell
13
Smallest unit of an element