Across
1
Molten rock beneath Earth surface
3
Curved glass that refracts light
4
Disturbance that transfers energy
5
Blocking of light by a celestial body
8
Positive particle in nucleus
9
Tissue that contracts for movement
10
Gas form of a liquid
Down
1
Measure of matter in an object
2
Second lightest element
6
Hottest planet in solar system
7
Substance with pH above 7
8
Fourth state of matter