Across
1
Unit of heredity
4
Unit of energy
5
Molten rock beneath Earth surface
8
Nerve cell in the brain
9
Naturally occurring inorganic solid
Down
2
Basic unit of life
3
Tectonic landmass section
6
Push or pull on an object
7
Second lightest element
10
Biological catalyst
11
Absolute temperature scale unit
12
Positive particle in nucleus