SECTION 1 ANSWERS RELATED TO FARENHORST LECTURES 1.All (1 mark) 2.Benzene (1 mark) 3.500 to 5,000 mg/kg (1 mark) and one of the following (1 mark): •Glyphosate •Sodium chloride •Sodium hypochlorite •Atrazine •Acetylsalicylic acid •Morphine sulfate 4.Lead (1 mark) 5.Hippocrates (1 mark) 6.4100 (1 mark), “2706” or “most” or “66%” (1 mark; note 2706, most or 66% are all correct answers) 7.40 (1 mark) 8.1 (1 mark) SECTION 4 ANSWERS RELATED TO FARENHORST LECTURES 1. What are frozen hydrates? (1 mark). Give one mark for answers that are something like: •chemicals in ice •methane in ice •a solid form of water that contains chemicals within its crystal structure •a solid form of water that contains methane within its crystal structure 2. Explain the difference between a toxin and toxicant. (2 marks) Give one mark for answers that are something like: •A toxin is a poisonous substance produced by living cells or organisms. •A toxin is produced by a living organism •A toxin is naturally produced Give an additional one mark for answers that are something like: •A toxicant is a poisonous substance that is typically introduced by human acticities •A toxicant is created by humans •A toxicant is produced by humans
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