True - Nicotine is lethal at 0.5-0.1 mg/kg (it would be very difficult to overdose on smoking alone. However, if a child were to ingest as little as 6 mg of nicotine they could potentially die. For coffee, it would take about 70 cups of coffee to kill a person weighing about 154 lbs. However, it is the Caffeine in coffee that would kill you not the coffee itself. ( idk if your teacher would be picky about the wording) For example, decaffeinated coffee would need a much much larger dose to kill a human with caffeine intake.
