Across
1
Second lightest element
4
Unit of heredity
5
Solid with repeating atomic pattern
8
Absolute temperature scale unit
10
Push or pull on an object
Down
2
Reddish electrical conductor
3
Blocking of light by a celestial body
6
Naturally occurring inorganic solid
7
Substance with pH below 7
9
Gas form of a liquid
11
Biological catalyst
12
Infectious microscopic agent
13
Basic unit of life