横向
1
Blocking of light by a celestial body
3
Form of thermal energy
4
Positive particle in nucleus
5
Molten rock beneath Earth surface
6
Reddish electrical conductor
7
Disturbance that transfers energy
8
Mass per unit volume
9
Center of an atom or cell
纵向
1
Biological catalyst
2
Force that attracts objects together
3
Second lightest element
10
Measure of matter in an object
11
The Red Planet