| A | B |
|---|
| Nicotine | An addictive drug found in tobacco. |
| Tar | A thick, dark liquid that forms when tobacco burns. |
| Carbon Monoxide | A colorless, odorless, poisonous gas produced when tobacco burns. |
| Addiction | A psychological or physical need for a drug or other substance. |
| Withdrawal | The unpleasant symptoms that someone experiences when he or she stops using an addictive substance. |
| Psychological Dependence | An addiction in which a person believes that he or she needs a drug in order to feel good or function normally. |
| Physical Dependence | An addiction in which the body develops a chemical need for a drug. |
| Tolerance | The body’s need for a larger and larger doses of a drug to produce the same effect. |
| Secondhand Smoke | Air that has been contaminated by tobacco smoke. |
| Mainstream Smoke | The smoke that a smoker inhales and then exhales. |
| Passive Smokers | Nonsmokers who breathe secondhand smoke. |
| Drug | A substance other than food that changes the structure of function of the body. |
| Medicine | A drug that prevents or cures illness or eases its symptoms. |
| Prescription Medicine | A medicine that can be used safely only with a doctor’s written permission. |
| Over-the-Counter Medicine | Medicines that you can buy without a doctor’s prescription. |
| Side Effects | Reactions to medicines other than the ones intended. |
| Alcohol | A drug created by a chemical reaction in some foods, especially fruits and grains. |
| Intoxicated | Drunk. |
| Alcoholism | An illness characterized by a physical and psychological need for alcohol. |
| Illegal Drugs | Substances that are against the law for people of any age to manufacture, possess, buy, or sell. |
| Drug Abuse | Use of a drug for non-medical purposes. |
| Stimulants | Drugs that speed up the body’s functions. |
| Amphetamines | Strong stimulant drugs that speed up the nervous system. |
| Depressants | - Drugs that slow down the body’s functions and reactions, including heart and breathing rates. |
