Across
1
Biological catalyst
5
Disturbance that transfers energy
6
Path of a planet around the sun
8
Amplified beam of light
9
Glass that splits light into spectrum
11
Preserved remains of ancient life
Down
2
Substance with pH above 7
3
Chemical element in table salt
4
Center of an atom or cell
7
Blocking of light by a celestial body
10
Absolute temperature scale unit