横向
1
Unit of heredity
4
Group of similar cells
6
Solid with repeating atomic pattern
7
Chemical element in table salt
8
Natural satellite of Earth
11
Unit of force
纵向
2
Basic unit of life
3
Center of an atom or cell
5
Mass per unit volume
9
Measure of matter in an object
10
Particle of light
12
Glass that splits light into spectrum