What I Have Learned Directions: Read each siatement carefully. In your activity notebook, write the correct missing word each number. 13 any source of potential damage, harm or adverse health effects on something or someone under certain conditions at work 2. is the chance or probability that a person will be harmed or experience an adverse health effect if exposed to a hazard. is any substance that can cause harm, primarily to people. and can result in severe injuries if not properly handled or if carelessly used may cause worker an arc flash burn, thermal burn, or blast when a worker makes electrical contact. 5 are physical conditions that may pose a risk of injuries such as the muscles or ligaments of the lower back, tendons or nerves of the hands/wrists or bones surrounding the knees, resulting in musculoskeletal disorder