Across
1
Biological catalyst
5
Hottest planet in solar system
8
Solid with repeating atomic pattern
9
Glass that splits light into spectrum
10
Smallest unit of an element
11
Precious yellow metallic element
12
Particle of light
Down
2
Group of similar cells
3
Center of an atom or cell
4
Molten rock beneath Earth surface
6
Push or pull on an object
7
Absolute temperature scale unit
13
Nerve cell in the brain