横向
1
Substance with pH below 7
4
Unit of electric potential
6
Curved glass that refracts light
7
Solid with repeating atomic pattern
8
Naturally occurring inorganic solid
纵向
2
Ball of burning gas in space
3
Chemical element in table salt
5
Preserved remains of ancient life
9
Blocking of light by a celestial body
10
Fourth state of matter