Across
1
Unit of force
3
Solid with repeating atomic pattern
4
Ball of burning gas in space
5
Chemical element in table salt
7
Amplified beam of light
9
Element found in all living things
Down
1
Nerve cell in the brain
2
Center of an atom or cell
3
Icy body with a tail near the sun
6
Biological catalyst
8
Mass per unit volume
10
Magnetic metallic element