Across
- 4. the study of the harmful effects of substances on organisms
- 7. loss of body water
- 8. a sudden widespread occurrence of an infectious disease
- 9. vectors of malaria
- 10. waterborne disease that was once the world's leading cause of death
- 11. the amount of a harmful chemical to which a person is exposed
- 12. Center of Disease Control and Prevention
- 14. pesticides that break down quickly
- 20. Environmental Protection Agency
- 22. an infective agent that is able to multiply only within living cells
- 24. organisms that cause disease
- 26. a type of disease likely to be transmitted through the environment
- 28. world health organisation
- 29. a disease where the vector is a tick found on the white-tailed deer
Down
- 1. an organism in which a pathogen lives all or part of its life
- 2. the promotion of hygiene and the provision of clean drinking water
- 3. the amount of a chemical in the environment often expressed in ppm
- 5. the study of the spread of diseases
- 6. a secondary product made in the manufacture of something else
- 13. organisms that transmit diseases to people
- 15. used to kill bacteria
- 16. things in the air that are small enough to breathe into the lungs
- 17. chemicals designed o kill unwanted organisms
- 18. a disease that attacks the brain and memory
- 19. unicellular microorganisms
- 21. pesticides that do not break down quickly
- 23. chemicals that circulate in the bloodstream and control life processes
- 25. substances in the environment that has a harmful effect on organisms
- 27. a waterborne diseases caused by water polluted with human feces