Food Safety Hazards and Contamination
Year 11 Health and Safety Understanding Food Contamination Hazards Duration: 60 minutes
WALT - We Are Learning To
Identify the three main types of food contamination hazards Understand biological hazards, particularly bacteria and fungi Recognize conditions that promote bacterial and fungal growth Apply food safety knowledge to prevent contamination
Success Criteria
I can name and describe three types of food contamination hazards I can explain how bacteria and fungi contaminate food I can identify optimal conditions for microbial growth I can suggest prevention strategies for each hazard type
Opening Question
Think about the last time you prepared food at home What safety measures did you take? What could have gone wrong?
What Are Food Contamination Hazards?
Food contamination occurs when harmful substances enter food Can cause illness, injury, or death Three main categories of hazards Prevention is always better than treatment
Physical Contamination Hazards
Objects that shouldn't be in food Can cause choking, cuts, or broken teeth Examples: glass, plastic, hair, jewelry, bandages Often result from poor hygiene or equipment failure
Case Study: The Sticking Plaster
Read the scenario: Joe is chopping vegetables for soup His bandage falls into the soup unnoticed Discuss in pairs: What went wrong? How could this have been prevented?
Chemical Contamination Hazards
Toxic substances that contaminate food Can cause poisoning or allergic reactions Examples: cleaning chemicals, pesticides, food additives Often invisible and tasteless
Brain Break: Contamination Charades
Students act out different contamination scenarios Class guesses the type of hazard Physical, chemical, or biological? 5-minute energizer activity
Biological Contamination Hazards
Living organisms that contaminate food Most common cause of foodborne illness Include bacteria, viruses, fungi, and parasites Can multiply rapidly in food
Focus on Bacteria
Single-celled microorganisms Some are harmful, some are beneficial Reproduce by splitting in half Can double in number every 20 minutes
Quick Check
If one bacterium doubles every 20 minutes... How many bacteria will there be after 2 hours? Show your working!
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