Across
1
Biological catalyst
5
Measure of matter in an object
6
Ball of burning gas in space
8
Unit of power
9
Solid with repeating atomic pattern
Down
2
Basic unit of life
3
Substance with pH above 7
4
Molten rock beneath Earth surface
7
The Red Planet
10
Infectious microscopic agent
11
Mass per unit volume
12
Tissue that contracts for movement