A hazard is a situation or event that has the potential to cause damage to plant or equipment, or result in an illness or injury. Hazards can be categorised by the type of outcome, energy exchange process or geographic location, i.e. manual handling hazards, slips and trips, laundry hazards. A risk is the likelihood of a specific consequence occurring. Risks are usually expressed in terms of likelihood and consequences.
If you have identified a hazard please ensure that you tell someone such as your teacher who will ensure that further action will be taken to reduce or eliminate the hazard.