Across
1
Gas essential for breathing
2
Fourth state of matter
3
Substance with pH below 7
5
Basic unit of life
8
Reddish electrical conductor
9
Unit of power
11
Element found in all living things
Down
2
Tectonic landmass section
4
Push or pull on an object
6
Smallest unit of an element
7
Unit of force
10
Chemical element in table salt
12
Magnetic metallic element