横向
1
Nerve cell in the brain
4
Unit of heredity
5
Our home planet
6
Ball of burning gas in space
10
Absolute temperature scale unit
11
Fourth state of matter
13
Preserved remains of ancient life
纵向
2
Smallest unit of an element
3
Hottest planet in solar system
4
Precious yellow metallic element
7
Gas form of a liquid
8
Tectonic landmass section
9
Unit of energy
12
Group of similar cells