Across
1
Unit of heredity
4
Blocking of light by a celestial body
5
Glass that splits light into spectrum
7
Form of thermal energy
8
Molten rock beneath Earth surface
9
Positive particle in nucleus
Down
1
Precious yellow metallic element
2
Substance with pH above 7
3
Reddish electrical conductor
6
Center of an atom or cell
10
Biological catalyst