Across
1
Chemical element in table salt
3
Disturbance that transfers energy
4
Unit of heredity
9
Blocking of light by a celestial body
10
Glass that splits light into spectrum
11
Icy body with a tail near the sun
Down
2
Molten rock beneath Earth surface
5
Biological catalyst
6
Preserved remains of ancient life
7
Compound containing oxygen
8
Absolute temperature scale unit