Across
1
Blocking of light by a celestial body
3
Unit of electric potential
6
Tectonic landmass section
7
Our home planet
9
Natural satellite of Earth
11
Curved glass that refracts light
Down
2
Element found in all living things
4
Disturbance that transfers energy
5
Fourth state of matter
8
Biological catalyst
10
Gas form of a liquid
12
Positive particle in nucleus
13
Chemical element in table salt