横向
1
Unit of heredity
4
Our home planet
5
Push or pull on an object
6
Solid with repeating atomic pattern
7
Particle of light
11
Unit of energy
纵向
2
Blocking of light by a celestial body
3
Icy body with a tail near the sun
8
Smallest unit of an element
9
Compound containing oxygen
10
Mass per unit volume
12
Reddish electrical conductor