Across
1
Absolute temperature scale unit
4
Gas essential for breathing
6
Solid with repeating atomic pattern
8
Nerve cell in the brain
10
Natural satellite of Earth
Down
2
Hottest planet in solar system
3
Unit of heredity
5
Unit of force
7
Positive particle in nucleus
9
Tissue that contracts for movement
11
Amplified beam of light
12
Element found in all living things
13
Center of an atom or cell