Week 8

1. The sudden, violent throwing back of wood or a tool toward the operator when a blade gets pinched or bound.
7. A safety system that connects an electrical circuit to the earth to safely divert dangerous stray currents.
8. Suffocation caused by a lack of oxygen, which leads to unconsciousness or death.
10. Injury or death caused by a severe electric shock passing through the body.

2. The sudden collapse of a trench or hole's dirt walls, which can trap or bury workers.
3. A fast-acting safety device that cuts off electricity to prevent severe shocks, especially in wet areas.
4. An excavation safety method where the walls of a trench are cut into steps to prevent collapses.
5. Wood that is filled with knots, which are hard, round imperfections where tree branches once grew.
6. A protective mask worn over the mouth and nose to filter out toxic dust, fumes, or gases.
9. A minor workplace disturbance or irritation (like dust, noise, or odors) that is disruptive but not immediately dangerous.