Working safely
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👩 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)
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📝 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).
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💬 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?
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🧒 Student Worksheet
Concept and Helping Material
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.
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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.
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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?
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Practice Questions (QA)
1. What does PPE stand for?
2. Why are goggles important in science labs?
3. What should you do first if there is a spill?
4. Why should long hair be tied back?
5. When should you wash hands in a lab?
6. What is a risk assessment?
7. Why should you not taste chemicals?
8. How should broken glass be handled?
9. Why is clutter on benches risky?
10. What should you do if you get a chemical on your skin?
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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?