Hazardous Chemicals: Lab Safety and Density Challenge
Hazardous Chemicals: Lab Safety and Density Challenge
Items in this lesson
Hazardous Chemicals: Lab Safety and Density Challenge
What do you already know about handling chemicals safely?
Learning Intention
To work safely with hazardous chemicals and follow laboratory instructions as a team.
Success criteria
🧪 Follow scientific instructions independently
👓 Work safely in a laboratory
🔬 Make observations
⚖️ Investigate density
Mission Brief: Your Task
You are trainee scientists at Girvan Academy.
Your challenge is to build a safe, stable, multi-layered chemical sample—without mixing the hazardous liquids.
Safety Symbols Challenge
What do these symbols mean: ☣️, 🔥, 👓, ⚠️, 🧤? Discuss their importance in the lab.
Laboratory Safety Rules
All scientists must:
👓 Wear eye protection
👩🔬 Tie long hair back
🧪 Handle chemicals carefully
🚶 Walk at all times
📖 Follow instructions exactly
🤝 Work together
Competition Criteria
🏆 Best Density Tower
Points awarded for:
⭐ Clear layers
⭐ All chemicals visible
⭐ Excellent teamwork
⭐ Safe working.
How to Build Your Tower
Read instructions carefully.
Work very safely
Transfer liquids slowly.
Don’t disturb layers.
Observe changes as you build.
Observation Time
Scientists observe.
What do you notice?
Which chemicals sink?
Which float?
Which seem heavier?
The Science: Density Explained
Liquids with more dissolved substances are denser—so they sink. Less dense liquids float. That’s why your sample forms layers.
Exit Questions
1. What is density?
2. Which liquid was most dense?
3. Name a safety symbol you remember.
4. What helped your team build a great tower?
