横向
1
Gas essential for breathing
4
Substance with pH above 7
6
Hottest planet in solar system
8
Precious yellow metallic element
9
Substance with pH below 7
10
Glass that splits light into spectrum
12
Second lightest element
纵向
2
Reddish electrical conductor
3
Blocking of light by a celestial body
5
Molten rock beneath Earth surface
7
Preserved remains of ancient life
11
Magnetic metallic element