Across
1
Curved glass that refracts light
4
Molten rock beneath Earth surface
5
Magnetic metallic element
8
Unit of power
9
Element found in all living things
10
Preserved remains of ancient life
11
Infectious microscopic agent
Down
2
Unit of electric potential
3
Glass that splits light into spectrum
6
Gas essential for breathing
7
Naturally occurring inorganic solid
9
Basic unit of life
12
Substance with pH above 7