Across
1
Naturally occurring inorganic solid
2
Tectonic landmass section
4
Group of similar cells
5
Mass per unit volume
6
Our home planet
9
Absolute temperature scale unit
11
Precious yellow metallic element
Down
2
Particle of light
3
Substance with pH above 7
7
Center of an atom or cell
8
Push or pull on an object
10
Biological catalyst