Across
1
Unit of force
3
Tissue that contracts for movement
6
Gas form of a liquid
7
Solid with repeating atomic pattern
9
Substance with pH below 7
10
Hottest planet in solar system
11
Precious yellow metallic element
Down
2
Reddish electrical conductor
4
Group of similar cells
5
Basic unit of life
8
Second lightest element
12
Positive particle in nucleus