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Science Vocabulary List & Definitions

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

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