Across
1
Solid with repeating atomic pattern
2
Element found in all living things
4
Icy body with a tail near the sun
5
Natural satellite of Earth
6
Push or pull on an object
7
Glass that splits light into spectrum
10
Disturbance that transfers energy
11
Second lightest element
Down
1
Reddish electrical conductor
2
Basic unit of life
3
Center of an atom or cell
8
Substance with pH below 7
9
Fourth state of matter
12
Path of a planet around the sun