Across
1
Molten rock beneath Earth surface
5
Basic unit of life
6
Element found in all living things
8
Unit of force
9
Preserved remains of ancient life
11
Disturbance that transfers energy
12
Mass per unit volume
Down
2
Biological catalyst
3
Chemical element in table salt
4
Substance with pH below 7
7
Curved glass that refracts light
10
Hottest planet in solar system
13
Absolute temperature scale unit
14
Precious yellow metallic element