横向
1
Blocking of light by a celestial body
5
Icy body with a tail near the sun
6
Fourth state of matter
7
Our home planet
9
Infectious microscopic agent
12
Gas essential for breathing
纵向
2
Naturally occurring inorganic solid
3
Group of similar cells
4
Disturbance that transfers energy
8
Unit of heredity
10
Unit of electric potential
11
Preserved remains of ancient life