Across
1
Glass that splits light into spectrum
4
Unit of force
5
Gas essential for breathing
6
Substance with pH below 7
7
Hottest planet in solar system
10
Smallest unit of an element
Down
2
Preserved remains of ancient life
3
Molten rock beneath Earth surface
4
Nerve cell in the brain
8
Infectious microscopic agent
9
Push or pull on an object