| 1. A particle with a negative
|| 2. The smallest unit of living
matter that can function by itself.
|| 3. A small piece of a substance
that is made up of at least two atoms.
|| 4. A living thing that is
composed of one or more cells.
| 5. The center of an atom.
|| 6. A particle with a positive
|| 7. The rate at which the
position of an object changes.
|| 8. A substance that dissolves
| 9. The physical matter and
existence of an object.
|| 10. A substance that has
mass and makes up all objects.
|| 11. A force that opposes
|| 12. The amount of electricity
in an object that is caused by an excess or deficiency of electrons.
| 13. The cooperative relationship
of two different species.
|| 14. The ability of an organism
to maintain a stable equilibrium.
|| 15. A tiny particle of matter
that is the smallest piece of an element.