Across
1
Chemical element in table salt
5
Curved glass that refracts light
7
Tectonic landmass section
8
Smallest unit of an element
11
Path of a planet around the sun
Down
2
Precious yellow metallic element
3
Biological catalyst
4
Naturally occurring inorganic solid
6
Natural satellite of Earth
9
Disturbance that transfers energy
10
Form of thermal energy