Across
1
Absolute temperature scale unit
3
The Red Planet
6
Substance with pH above 7
9
Reddish electrical conductor
11
Force that attracts objects together
12
Disturbance that transfers energy
Down
2
Element found in all living things
4
Gas form of a liquid
5
Nerve cell in the brain
7
Infectious microscopic agent
8
Basic unit of life
10
Center of an atom or cell