横向
1
Chemical element in table salt
5
Smallest unit of an element
7
Compound containing oxygen
8
Fourth state of matter
纵向
2
Path of a planet around the sun
3
Natural satellite of Earth
4
The Red Planet
6
Force that attracts objects together
Chemical element in table salt
Smallest unit of an element
Compound containing oxygen
Fourth state of matter
Path of a planet around the sun
Natural satellite of Earth
The Red Planet
Force that attracts objects together