Across
1
Tectonic landmass section
4
Precious yellow metallic element
5
Molten rock beneath Earth surface
6
The Red Planet
8
Particle of light
9
Magnetic metallic element
12
Form of thermal energy
Down
1
Glass that splits light into spectrum
2
Reddish electrical conductor
3
Substance with pH below 7
5
Measure of matter in an object
7
Smallest unit of an element
10
Our home planet
11
Icy body with a tail near the sun