Across
1
Gas form of a liquid
4
Biological catalyst
6
Glass that splits light into spectrum
7
Precious yellow metallic element
10
Preserved remains of ancient life
12
Substance with pH above 7
Down
2
Unit of energy
3
Molten rock beneath Earth surface
5
Tissue that contracts for movement
8
Naturally occurring inorganic solid
9
Disturbance that transfers energy
11
Blocking of light by a celestial body