Across
1
Disturbance that transfers energy
4
Preserved remains of ancient life
7
Blocking of light by a celestial body
8
Reddish electrical conductor
10
Natural satellite of Earth
12
Solid with repeating atomic pattern
13
Push or pull on an object
14
Unit of force
Down
2
Compound containing oxygen
3
Form of thermal energy
5
Center of an atom or cell
6
Tissue that contracts for movement
9
Amplified beam of light
11
Nerve cell in the brain