Across
1
Substance with pH above 7
3
Magnetic metallic element
4
Reddish electrical conductor
7
Unit of force
8
Biological catalyst
10
Naturally occurring inorganic solid
Down
2
Element found in all living things
4
Icy body with a tail near the sun
5
Absolute temperature scale unit
6
Path of a planet around the sun
9
Mass per unit volume
11
Unit of heredity
12
Fourth state of matter