Across
1
Curved glass that refracts light
4
Solid with repeating atomic pattern
5
Fourth state of matter
6
Push or pull on an object
7
Icy body with a tail near the sun
11
Magnetic metallic element
12
Substance with pH above 7
Down
2
Infectious microscopic agent
3
Naturally occurring inorganic solid
6
Preserved remains of ancient life
8
Smallest unit of an element
9
Unit of energy
10
Center of an atom or cell