横向
1
Path of a planet around the sun
3
Tectonic landmass section
5
Naturally occurring inorganic solid
7
Measure of matter in an object
9
Mass per unit volume
10
Compound containing oxygen
12
Preserved remains of ancient life
14
Form of thermal energy
纵向
2
Blocking of light by a celestial body
4
Unit of power
6
Curved glass that refracts light
8
Center of an atom or cell
11
Positive particle in nucleus
13
Unit of electric potential