横向
1
Icy body with a tail near the sun
2
Positive particle in nucleus
6
Molten rock beneath Earth surface
7
Substance with pH below 7
8
Force that attracts objects together
纵向
1
Solid with repeating atomic pattern
2
Glass that splits light into spectrum
3
Ball of burning gas in space
4
Tectonic landmass section
5
Curved glass that refracts light