横向
1
Curved glass that refracts light
3
Substance with pH below 7
5
Naturally occurring inorganic solid
8
Form of thermal energy
9
Molten rock beneath Earth surface
纵向
2
Substance with pH above 7
4
Group of similar cells
5
Measure of matter in an object
6
Center of an atom or cell
7
Ball of burning gas in space