Across
1
Smallest unit of an element
4
Ball of burning gas in space
6
Absolute temperature scale unit
8
Magnetic metallic element
10
The Red Planet
11
Reddish electrical conductor
Down
2
Push or pull on an object
3
Force that attracts objects together
5
Unit of force
7
Unit of heredity
9
Infectious microscopic agent
10
Molten rock beneath Earth surface
12
Mass per unit volume