横向
1
Compound containing oxygen
2
Unit of electric potential
4
Mass per unit volume
5
Group of similar cells
6
Path of a planet around the sun
纵向
1
Gas essential for breathing
2
Hottest planet in solar system
3
Force that attracts objects together
7
Measure of matter in an object
8
Substance with pH above 7
9
Tectonic landmass section