Across
1
Magnetic metallic element
2
Solid with repeating atomic pattern
7
Mass per unit volume
8
Tissue that contracts for movement
12
Unit of heredity
13
Absolute temperature scale unit
Down
2
Reddish electrical conductor
3
Amplified beam of light
4
Path of a planet around the sun
5
Infectious microscopic agent
6
Smallest unit of an element
9
Compound containing oxygen
10
Chemical element in table salt
11
Group of similar cells