Across
1
Gas essential for breathing
3
Naturally occurring inorganic solid
5
Hottest planet in solar system
7
Unit of heredity
8
Tectonic landmass section
9
Curved glass that refracts light
Down
2
Basic unit of life
4
Magnetic metallic element
5
Unit of electric potential
6
Mass per unit volume
10
Solid with repeating atomic pattern
11
Natural satellite of Earth