Across
1
Smallest unit of an element
3
Biological catalyst
4
Substance with pH below 7
6
Preserved remains of ancient life
Down
2
Chemical element in table salt
5
Tectonic landmass section
7
Group of similar cells
8
Molten rock beneath Earth surface
Smallest unit of an element
Biological catalyst
Substance with pH below 7
Preserved remains of ancient life
Chemical element in table salt
Tectonic landmass section
Group of similar cells
Molten rock beneath Earth surface