Across
1
Solid with repeating atomic pattern
3
Push or pull on an object
5
Path of a planet around the sun
8
Unit of electric potential
9
Biological catalyst
10
Naturally occurring inorganic solid
Down
1
Basic unit of life
2
Ball of burning gas in space
4
Element found in all living things
6
Reddish electrical conductor
7
Center of an atom or cell