Unit 1 Chem - Toxicity

The quantity of a substance you are exposed to is the

• toxicity

• hazard

• LD₅₀

• dose

The amount of a substance that killed half of the 

    animals in a laboratory test is the

• toxicity

• hazard

• LD₅₀

• dose

Which is considered more toxic: a substance with a lethal dose of 47.2mg/kg or one with an lethal dose of 0.8mg/kg?

• A substance with a lethal dose of 47.2mg/kg
• A substance with a lethal dose of 0.8mg/kg
• Both are equally toxic
• Neither is toxic

The LD₅₀ of saccharin is 17.0 g/kg. What is the smallest mass of saccharin that would be lethal to a person who weighs 165 pounds? (2.2 lb = 1 kg)

• 1275 g

• 1320 g

• 1500 g

• 1650 g

All substances are

• dangerous

• toxic in large enough quantities

• safe

Why is the amount of a substance that would be lethal different for adults and children?

• Because adults and children have different body sizes
• Because adults and children have different favorite colors
• Because adults and children have different metabolisms

• Because adults and children have different appetites