横向
1
Force that attracts objects together
5
Compound containing oxygen
6
The Red Planet
纵向
2
Measure of matter in an object
3
Form of thermal energy
4
Magnetic metallic element
7
Push or pull on an object
8
Mass per unit volume
Force that attracts objects together
Compound containing oxygen
The Red Planet
Measure of matter in an object
Form of thermal energy
Magnetic metallic element
Push or pull on an object
Mass per unit volume