Across
1
Solid with repeating atomic pattern
5
Fourth state of matter
6
Tectonic landmass section
7
Hottest planet in solar system
9
Curved glass that refracts light
14
Unit of electric potential
15
Path of a planet around the sun
Down
2
Substance with pH below 7
3
Preserved remains of ancient life
4
Blocking of light by a celestial body
8
Amplified beam of light
10
Gas form of a liquid
11
Chemical element in table salt
12
Icy body with a tail near the sun
13
Positive particle in nucleus