Across
1
Unit of force
3
Fourth state of matter
6
Chemical element in table salt
8
Substance with pH above 7
10
Preserved remains of ancient life
12
Particle of light
Down
2
Absolute temperature scale unit
4
Path of a planet around the sun
5
Curved glass that refracts light
7
Reddish electrical conductor
9
Natural satellite of Earth
11
Smallest unit of an element
13
The Red Planet
14
Solid with repeating atomic pattern