Final answer:
A thermal hazard occurs when excessive electric power causes undesired thermal effects, while a shock hazard occurs when electric current passes through a person. Thermal hazards are associated with physical injuries like fire or burns, while shock hazards can lead to physical injuries and electrical hazards like electric shock or even death.
Step-by-step explanation:
There are two known hazards of electricity: thermal and shock. A thermal hazard occurs when excessive electric power causes undesired thermal effects, such as starting a fire. On the other hand, a shock hazard occurs when electric current passes through a person, ranging in severity from painful to lethality.
Thermal hazards are often associated with physical injuries like fire or burns, while shock hazards can lead to both physical injuries and electrical hazards like electric shock or even death.
It is important to implement proper electrical safety systems and devices to prevent these hazards and ensure personal safety.