Across
1
Naturally occurring inorganic solid
2
Tectonic landmass section
4
Precious yellow metallic element
5
Form of thermal energy
6
Fourth state of matter
9
Magnetic metallic element
10
Path of a planet around the sun
Down
1
Measure of matter in an object
2
Particle of light
3
Substance with pH above 7
7
Gas essential for breathing
8
Smallest unit of an element