横向
1
Chemical element in table salt
3
Disturbance that transfers energy
6
Precious yellow metallic element
7
Mass per unit volume
12
Center of an atom or cell
纵向
2
Gas essential for breathing
4
Molten rock beneath Earth surface
5
Substance with pH below 7
8
Curved glass that refracts light
9
Blocking of light by a celestial body
10
Measure of matter in an object
11
Naturally occurring inorganic solid