Across
1
Absolute temperature scale unit
4
Tissue that contracts for movement
5
Tectonic landmass section
6
Icy body with a tail near the sun
10
Molten rock beneath Earth surface
11
Center of an atom or cell
Down
2
Solid with repeating atomic pattern
3
Magnetic metallic element
7
Biological catalyst
8
Chemical element in table salt
9
Particle of light
12
Disturbance that transfers energy
13
Unit of heredity