Across
1
Form of thermal energy
3
Reddish electrical conductor
5
Chemical element in table salt
8
Absolute temperature scale unit
10
Naturally occurring inorganic solid
Down
2
Nerve cell in the brain
4
Substance with pH below 7
6
Magnetic metallic element
7
Force that attracts objects together
9
Natural satellite of Earth
11
Precious yellow metallic element
12
Substance with pH above 7