横向
1
Hottest planet in solar system
4
Unit of electric potential
5
Center of an atom or cell
7
Ball of burning gas in space
8
Substance with pH above 7
9
Measure of matter in an object
10
Glass that splits light into spectrum
纵向
2
Mass per unit volume
3
Solid with repeating atomic pattern
5
Nerve cell in the brain
6
Preserved remains of ancient life
11
Positive particle in nucleus
12
Molten rock beneath Earth surface