Across
1
Absolute temperature scale unit
3
Tissue that contracts for movement
6
Magnetic metallic element
8
Molten rock beneath Earth surface
9
Curved glass that refracts light
10
Substance with pH above 7
11
Push or pull on an object
12
Glass that splits light into spectrum
Down
2
Biological catalyst
4
Naturally occurring inorganic solid
5
Gas essential for breathing
7
Nerve cell in the brain
13
Infectious microscopic agent