横向
1
Biological catalyst
5
Absolute temperature scale unit
6
Our home planet
7
Substance with pH below 7
8
Curved glass that refracts light
9
Disturbance that transfers energy
10
Reddish electrical conductor
13
Positive particle in nucleus
纵向
2
Unit of force
3
Naturally occurring inorganic solid
4
Tectonic landmass section
11
Force that attracts objects together
12
Group of similar cells