横向
1
Blocking of light by a celestial body
4
Unit of heredity
6
Magnetic metallic element
7
Compound containing oxygen
8
Gas form of a liquid
10
Naturally occurring inorganic solid
13
Ball of burning gas in space
纵向
2
Nerve cell in the brain
3
Icy body with a tail near the sun
5
Particle of light
9
Unit of energy
11
Mass per unit volume
12
Our home planet