Greek Roots

4. The scientific study of the mind and behavior.
5. A substance that kills or inhibits the growth of bacteria.
8. A close and often long-term interaction between two different biological species.
11. An account of a person's life written by someone else.
12. The fundamental unit of length in the metric system.
13. Treatment of injury, disease, or disorder through physical methods, such as massage and exercise.
14. Capable of being broken down by natural processes into simpler, harmless compounds.
18. One thousandth of a meter, a very small unit of length.

1. Relating to the body as opposed to the mind; tangible or concrete.
2. A branch of medicine that deals with mental disorders.
3. A medical doctor who practices medicine.
6. A device that measures atmospheric pressure, often used to predict weather changes.
7. One thousand meters, a unit of length in the metric system.
9. One hundredth of a meter, a unit of length in the metric system.
10. One-tenth of a meter, a unit of length in the metric system.
14. The scientific study of living organisms.
15. A straight line passing from one side of a circle to the other, or the width of a circular object.
16. An instrument used for measuring temperature.
17. The total length of the boundary around a geometric figure.