Across
1
Naturally occurring inorganic solid
5
Nerve cell in the brain
6
Gas essential for breathing
7
Substance with pH above 7
11
Element found in all living things
12
Unit of power
13
Natural satellite of Earth
Down
2
Biological catalyst
3
Unit of force
4
Reddish electrical conductor
8
Blocking of light by a celestial body
9
Unit of heredity
10
Force that attracts objects together
14
Solid with repeating atomic pattern