Working safely
👩 Teacher’s Guide
🎯 Objective
Students will be able to:
- Follow basic lab safety rules and explain why they exist
- Identify hazards and choose appropriate risk controls
- Respond appropriately to common lab incidents (spills, burns, cuts)
📝 Teaching Notes
- Key idea to emphasize: Main concept: safety is planned—hazards are identified and controlled.
- Common misconception: Misconception: safety rules are arbitrary and only for 'dangerous' experiments.
- Suggested teaching approach:
- Teach 'stop-think-act' before starting.
- Demonstrate PPE choices for common hazards.
- Practice emergency routines (eye wash, spill response).
💬 Discussion Starter
Ask students:
- Why is evidence more important than opinion in science?
- What makes an experiment a “fair test”?
- How can scientists disagree and still make progress?
🧒 Student Worksheet
Concept and Helping Material
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Safe science means identifying hazards and using controls like rules, PPE, and good routines. Safety planning helps prevent accidents and makes practical work more successful.
Vocabulary and Definitions
- — Personal protective equipment like goggles or gloves.
- — Something that could cause harm.
- — Identifying hazards and how to control them.
- — A step that reduces risk, like using tongs.
- — Steps to follow in an accident or spill.
Hands-On Experiment or Activities
Activity 1: PPE and Hazard Matching
What You Need: cards showing hazards (splashes, heat, sharp objects) and PPE.
What You Do: Match hazards to PPE and justify choices.
Think and Talk: What changed? What stayed the same?
Activity 2: Spill Response Roleplay
What You Need: water, tray, paper towels, 'spill' signs.
What You Do: Simulate a spill; practice steps: alert, isolate area, clean safely, wash hands.
Think and Talk: What changed? What stayed the same?
Practice Questions (QA)
- What does PPE stand for?
- Why are goggles important in science labs?
- What should you do first if there is a spill?
- Why should long hair be tied back?
- When should you wash hands in a lab?
- What is a risk assessment?
- Why should you not taste chemicals?
- How should broken glass be handled?
- Why is clutter on benches risky?
- What should you do if you get a chemical on your skin?
Reflection
- How could working safely help you make a better decision in real life?
- What is one habit you can practice to improve your scientific thinking?