Topic 4: Pollutions and Doses

Question 1

Pollutant

Answer 1

• Any material or form of energy that ill cause harm to a living organism
  Ex. DDT

Question 2

Pollution

Answer 2

• Any change to an environment that produces a condition that is harmful to living things
  Ex. effects of DDT

Question 3

Acute Toxicity

Answer 3

• Symptoms occur after only one exposure with a chemical

Question 4

Chronic Toxicity

Answer 4

• Symptoms appear only after a chemical reaches a certain level after multiple exposures
  Ex. lead

Question 5

LD50

Answer 5

• Refers to the dose of the chemical that will kill %50 of population
  Ex. bacterium

Question 6

Toxicity

Answer 6

• Ability of a chemical to cause harm to an organism

Question 7

Thalidomide

Answer 7

• Sleeping pill
• Harmed pregnant peoples babies
• Was tested normally but reacted differently when given to human