Evaluating Chemical Hazards

4. Scientists estimate the toxicity of a chemical by determining the effects of various doses of a chemical on test organisms and plotting the results in a _________
5. people not exposed to the agent
6. made by physicians, provide information about people suffering some adverse health effect or death after exposure to a chemical
7. is the study of the harmful effects of chemicals on humans and other organisms
9. individuals are sensitive to a number of toxins—a condition know as ________________
12. the amount of a harmful chemical that a person has ingested, inhaled, or absorbed through the skin
14. can kill with 1 teaspoon to 1 ounce include Mercury salts, morphine, codeine
17. is a permanent or long-lasting consequence
19. mice and rats are widely used because, as mammals, their systems function somewhat like humans’ systems do
20. two students who asked for this crossword puzzle
21. examples include Nerve gases, botulism toxin, mushroom toxin, dioxin (TCDD)

1. include Ethyl alcohol, Lysol, soaps
2. is the dose that can kill 50% of the animals (usually rats and mice) in a test population within an 18-day period
3. ___________ or resistance to breakdown, examples include DDT and PCBs
8. study which compare the health of people exposed to a particular chemical with the health of a similar group of people not exposed to the agent
10. ____________and young children are more susceptible to the effects of toxic substances than are adults for three major reasons
11. is a measure of the harmfulness of a substance
13. is the damage to health resulting from exposure to a chemical
15. in which the concentrations of some potential toxins in the environment increase as they pass through the successive trophic levels of food chains and webs
16. a dose that will kill an animal
18. can kill with 7 drops to 1 teaspoonand include Potassium cyanide, heroin, atropine, parathion, nicotine