横向
1
Push or pull on an object
3
Smallest unit of an element
5
Chemical element in table salt
8
Substance with pH below 7
纵向
2
The Red Planet
4
Molten rock beneath Earth surface
6
Form of thermal energy
7
Mass per unit volume
Push or pull on an object
Smallest unit of an element
Chemical element in table salt
Substance with pH below 7
The Red Planet
Molten rock beneath Earth surface
Form of thermal energy
Mass per unit volume