Across
1
Path of a planet around the sun
3
Center of an atom or cell
5
Fourth state of matter
7
Substance with pH below 7
8
Measure of matter in an object
9
Push or pull on an object
10
Magnetic metallic element
11
Smallest unit of an element
Down
1
Compound containing oxygen
2
Gas form of a liquid
3
Nerve cell in the brain
4
Infectious microscopic agent
6
Solid with repeating atomic pattern
8
Molten rock beneath Earth surface