Across
1
Absolute temperature scale unit
2
Measure of matter in an object
3
Solid with repeating atomic pattern
5
Preserved remains of ancient life
6
Unit of electric potential
8
Group of similar cells
9
Unit of force
Down
2
Naturally occurring inorganic solid
3
Icy body with a tail near the sun
4
Center of an atom or cell
7
Compound containing oxygen
10
Curved glass that refracts light