Across
1
Measure of matter in an object
3
Natural satellite of Earth
4
Compound containing oxygen
5
Center of an atom or cell
6
Unit of electric potential
7
Glass that splits light into spectrum
11
Magnetic metallic element
Down
2
Chemical element in table salt
3
Tissue that contracts for movement
7
Positive particle in nucleus
8
Mass per unit volume
9
Substance with pH below 7
10
Biological catalyst