横向
1
Center of an atom or cell
5
Particle of light
7
Path of a planet around the sun
8
Naturally occurring inorganic solid
9
Measure of matter in an object
10
Unit of heredity
纵向
2
Solid with repeating atomic pattern
3
Unit of energy
4
Mass per unit volume
6
Nerve cell in the brain
11
Ball of burning gas in space