Across
1
Force that attracts objects together
4
Magnetic metallic element
5
Element found in all living things
6
Basic unit of life
10
Form of thermal energy
11
Positive particle in nucleus
12
Tissue that contracts for movement
Down
2
Nerve cell in the brain
3
Tectonic landmass section
7
Compound containing oxygen
8
Substance with pH above 7
9
Unit of electric potential