Across
1
Tectonic landmass section
2
Nerve cell in the brain
4
Natural satellite of Earth
5
Tissue that contracts for movement
9
Curved glass that refracts light
Down
2
Unit of force
3
Solid with repeating atomic pattern
6
Chemical element in table salt
7
Disturbance that transfers energy
8
Gas essential for breathing
10
Center of an atom or cell
11
Measure of matter in an object