Across
1
Molten rock beneath Earth surface
2
Blocking of light by a celestial body
3
Glass that splits light into spectrum
7
Hottest planet in solar system
8
Reddish electrical conductor
Down
1
Measure of matter in an object
3
Tectonic landmass section
4
Form of thermal energy
5
Center of an atom or cell
6
Path of a planet around the sun