Across
1
Fourth state of matter
3
Second lightest element
4
Nerve cell in the brain
5
Blocking of light by a celestial body
10
Gas form of a liquid
13
Tissue that contracts for movement
Down
1
Tectonic landmass section
2
Solid with repeating atomic pattern
3
Form of thermal energy
6
Amplified beam of light
7
Chemical element in table salt
8
Push or pull on an object
9
Measure of matter in an object
11
Group of similar cells
12
Disturbance that transfers energy