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五、環(huán)境衛(wèi)生學核心概念 The 5 Core Concepts A Toxic Word Game Toxic means _____________________. Toxic_____ is the study of poisons. Toxic___ is a measure of how dangerous a chemical is. poisonous or dangerous ology ity A Toxicity Scale Toxicity Rating Signal Words on Package Symbol on Package Highly Toxic DANGER or POISON Moderately Toxic WARNING Slightly Toxic CAUTION Not Toxic none How would you rate these products? Toxicity Rating Highly Toxic Moderately Toxic Slightly Toxic Not Toxic And the answers are… Toxicity Rating Highly Toxic Moderately Toxic Slightly Toxic Not Toxic Exposure (暴露) is The total amount of a hazard that es in direct contact with your body. The 3 parts of exposure The Source of the hazard (bus exhaust) The Environmental Pathway (air) The Contact (inhaled fumes) Which route will the hazards take? Route 1: Inhalation (呼吸) Inhalation: Breathing. When chemicals enter the body through this route of exposure, they can get stuck in the lungs and/or be taken up into the bloodstream. Route 2: Ingestion (消化道) Ingestion: Swallowing (usually by eating or drinking). When chemicals enter the body through this route o