Across
1
Substance with pH above 7
3
Unit of heredity
4
Curved glass that refracts light
6
Tectonic landmass section
8
Infectious microscopic agent
10
Center of an atom or cell
12
Reddish electrical conductor
Down
2
Blocking of light by a celestial body
5
Absolute temperature scale unit
7
Measure of matter in an object
9
Mass per unit volume
11
Unit of energy