Across
1
Natural satellite of Earth
3
Solid with repeating atomic pattern
4
Ball of burning gas in space
8
Biological catalyst
9
Basic unit of life
11
Infectious microscopic agent
Down
1
Molten rock beneath Earth surface
2
Curved glass that refracts light
5
The Red Planet
6
Measure of matter in an object
7
Substance with pH above 7
10
Absolute temperature scale unit