横向
1
Force that attracts objects together
4
Substance with pH above 7
5
Fourth state of matter
6
Compound containing oxygen
9
Smallest unit of an element
10
Push or pull on an object
纵向
2
Gas essential for breathing
3
Unit of electric potential
5
Tectonic landmass section
7
Measure of matter in an object
8
Unit of energy
11
Icy body with a tail near the sun