横向
1
Biological catalyst
4
Substance with pH below 7
5
Tectonic landmass section
7
Molten rock beneath Earth surface
8
Measure of matter in an object
纵向
2
Disturbance that transfers energy
3
Icy body with a tail near the sun
5
Glass that splits light into spectrum
6
Smallest unit of an element
9
Our home planet