Across
1
Tectonic landmass section
4
Mass per unit volume
6
Element found in all living things
7
Hottest planet in solar system
10
Magnetic metallic element
Down
1
Positive particle in nucleus
2
Naturally occurring inorganic solid
3
Substance with pH above 7
5
Curved glass that refracts light
8
Unit of electric potential
9
Gas essential for breathing