Across
1
Group of similar cells
4
Naturally occurring inorganic solid
5
Positive particle in nucleus
9
Infectious microscopic agent
10
Molten rock beneath Earth surface
Down
2
Push or pull on an object
3
Path of a planet around the sun
4
Measure of matter in an object
6
Tissue that contracts for movement
7
Reddish electrical conductor
8
Chemical element in table salt