Matapaki / Discussion ^🔗

1. Turn to your partner and come up with four different rules that should exist in the lab to keep you safe!
2. Come write them on the board!

Matapaki / Discussion ^🔗

Tikanga Haumaru / Safety Rules ^🔗

• Always wear safety glasses
• Loose clothing should be done up or taken off
• Long hair should be tied back
• Do not eat or drink in the lab
• Always wash your hands thoroughly after experiments
• Follow instructions - dont’t play mad scientist!
• Know what to do in case of an accident!

Mahi Ngātahi / Group Activity ^🔗

1. Work in pairs (takirua)
2. Collect an A4 page from the front
3. Create a poster that can educate others about the most important safety rules (tikanga haumaru) for the lab!
4. Make it pretty and neat!

Whakamātau: Hydrogen Balloons ^🔗

1. Safety Considerations?
   • Safety glasses
   • If you break a flask, let Mr Le Sueur know
   • Don’t put your hands on your face until you wash them at the end of the period!
2. Collect a connical flask and a sheet of aluminium foil
3. Roughly tear up the foil into 2cm by 2cm squares
4. Place all the foil in the connical flask

Step 2: Collecting Hydrogen Gas ^🔗

1. Safety Considerations?
   • Be careful with the sodium hydroxide
   • If you get some on you, let Mr Le Sueur know and run the skin under cold water for 5 minutes.
   • Don’t breathe in or taste the chemicals
2. Collect a bottle of sodium hydroxide and balloon from the front of the lab
3. Pour enough sodium hydroxide into the flask to cover the aluminium
4. Put a balloon over the end of the flask
5. Wait 5 minutes

Step 3: Exploding Balloons ^🔗

1. Safety Considerations?
   • Explode them one at a time in the middle of the classroom
   • Stand well back
   • Cover ears
   • Safety glasses