横向
1
Push or pull on an object
3
Smallest unit of an element
5
Gas essential for breathing
6
Molten rock beneath Earth surface
7
Reddish electrical conductor
9
Unit of electric potential
10
Ball of burning gas in space
11
Mass per unit volume
纵向
2
The Red Planet
4
Unit of heredity
5
Path of a planet around the sun
6
Naturally occurring inorganic solid
8
Positive particle in nucleus