Across
1
Substance with pH above 7
5
Absolute temperature scale unit
7
Amplified beam of light
8
Magnetic metallic element
9
Basic unit of life
10
Glass that splits light into spectrum
12
Natural satellite of Earth
Down
2
Chemical element in table salt
3
Group of similar cells
4
Molten rock beneath Earth surface
6
Blocking of light by a celestial body
11
Preserved remains of ancient life