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Jan Stevenson

Jan Stevenson. Gisborne Secondary College Melton Road. Gisborne. 3437 Phone 0354283691 Fax 0354284018 E- mail jans@gisbornesc.vic.edu.au. PRACTICAL IDEAS. SCIENCE WEBSITE AT GISBORNE SECONDARY COLLEGE www.gisbornesc.vic.edu.au/home/jans/home/scihome.htm. Risk Evaluation Sheets

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Jan Stevenson

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  1. Jan Stevenson • Gisborne Secondary College • Melton Road. Gisborne. 3437 • Phone 0354283691 • Fax 0354284018 • E- mail jans@gisbornesc.vic.edu.au

  2. PRACTICAL IDEAS

  3. SCIENCE WEBSITE AT GISBORNE SECONDARY COLLEGEwww.gisbornesc.vic.edu.au/home/jans/home/scihome.htm • Risk Evaluation Sheets • “Quest Books” Experiments • Additional Experiments • Making Equipment for Science Classes • Science Handbook

  4. TOOLS • Drill & drill bits – preferably cordless. • Hand tools – hammer, screw drivers, pliers, wire strippers, spanners, shifters. • Jewelers screwdrivers – kit. • Tool kits – assortment of tools. • Glue gun. • Engraver. • Helping hands. • Soldering iron & solder.

  5. TOOLS • Socket set • Helping hands • Tool kit

  6. A few examples of equipment which can be purchased or adapted for classroom use Banana Plugs Crocodile clip adaptors Power supplies ELECTRICAL

  7. CONNECTIONS • Piggy Back Banana Plugs • NO SOLDERING

  8. CONNECTIONS • Crocodile Clip Adaptors • NO SOLDERING • Storage and management ideas

  9. POWER SUPPLIES • There are never enough power supplies. • Juggled from one prac to the next in one day. • Batteries go flat. • Constantly re-charging batteries. • Batteries & cradles get lost, stolen or broken. • Lots of time lost in constant maintenance.

  10. 1. Power Packs 3,6,9,12V. • They come with screw attachments which have been replaced with banana sockets. • Not too heavy, not too small.

  11. 2.Plug Packs. Specific Voltage • These are fitted with Banana Plug sockets • These were adapted for the ticker timers 16V AC

  12. 3. Plug packs Variable Ranges • These can be fitted with Banana Plugs • Used for simple electric circuits

  13. 4.Cut of the plug • Split the wire • The white wire is positive • Attach the banana plugs

  14. ELECTRODE KITS • PROBLEMS • Electrodes touching during experiment • Bad contact with crocodile clips • Constantly setting up and dismantling • Crocodile clips corrode when dropped in the solution

  15. Copper plate can be bought from the metalwork dept, use the guillotine to cut it. • Zinc sheet can be bought from a chemical supplier, can be cut with tin snips. • Drill or punch holes in each and fit with banana sockets.

  16. 250ml glass jars and plastic screw lids can be purchased cheaply from Cospac or you can ask staff for a collection • Cut 2 slits in the lid for the electrodes

  17. The electrodes are suspended from the jar lid

  18. Two jars can be placed side by side and a paper salt bridge can be placed between

  19. Paper salt bridges can be cut from blotting paper – paper used in desk pads • Blotting paper can also be used instead of chromatography paper at junior levels

  20. STEEL ELECTRODES • Solder copper wire to the heads of two nails and connect to the sockets • Drill two holes and suspend the nails from the lid • The lid can be placed over a 100ml beaker

  21. ELECTROPLATING • A copper electrode and a connecting wire soldered to the head of a nail • The nail can be cleaned with emery paper and reused

  22. CONDUCTIVITY TESTER • For testing liquids and solids • 100ml beaker used instead of a jar - less chemicals used

  23. MODEL ELECTRIC JUG • Nichrome wire is used to make the coils • A hole is drilled for the thermometer

  24. CAPACITORS • Choose a capacitor which is suitable for the experiment

  25. RESISTORS • Choose a resistor which is suitable for the experiment

  26. BUZZERS • The buzzers are fastened onto the lid with a hot glue gun

  27. TOGGLE SWITCHES • The switches are held in place with a screw fitting

  28. CARBON ELECTRODES • Carbon electrodes can be made from carbon rods • The rods are inserted through holes drilled in a lid and glued in place with silicon

  29. CONTACT SWITCHES • The metal can be cut and bent to shape using a guillotine • Mounted on a lid with banana sockets

  30. M.E.S. GLOBE HOLDERS • The holders can be mounted on lids and fitted with banana sockets

  31. SKILL TESTERS • Materials purchased from local hardware stores • Different degrees of difficulty – depending on the shape of the wire

  32. DINOSAUR TEMPLATE • Photocopy the pieces of the dinosaur model • Enlarge until it is the size required • Cut out the shapes and use these as the pattern • The slits are 6mm - the thickness of the MDF board used

  33. DINOSAUR JIGSAW Display the small model as a guide for the students

  34. LEMON BATTERY • Solder wire to the copper and zinc electrodes • Six lemons give a good supply of electrical energy • Use a L.E.D. in the circuit

  35. RAIN GUAGE • A copper shim and connecting wire soldered around the clothes peg • A small piece of soluble aspirin is placed in the jaws of the peg • Water is dropped onto the aspirin • When contact is made a buzzer sounds

  36. ALTERNATIVE QUICK FIT • Very expensive glassware • Use glass tubing covered with chux cloth and wound with wire • The chux cloth is soaked with water and acts as a condenser

  37. FORENSIC SCIENCE • Children’s shoes from the OP SHOP • Shoe prints • Transparency of shoe print section • Police report • List of suspects • Discover the perpetrators

  38. GAS GENERATOR • These gas generators can be set up and stored as a class set. • Carbon dioxide generator • Hydrogen generator

  39. SPOTTING TRAYS • Food testing • pH testing • Easy to clean • In place of test tubes

  40. PLASTIC CUPS • Polystyrene: • heat experiments • Plastic: • taste tests • Plaster • toothpaste. • Clear plastic: • growing seeds NO CLEANING

  41. SPATULAS • Damage • Don’t fit test tubes • Cleaning SOLUTION • Wooden stirrers

  42. CULTURE TUBES • Smaller in size • Smaller quantities needed • Cheaper to replace • Plastic tops instead of rubber stoppers

  43. Lists of equipment and Chemicals Quantities of Equipment and Chemicals Location of Equipment Easy for all staff to locate equipment Nothing gets “forgotten” PROBLEMS Equipment must be returned to the designated storage DATA BASES

  44. DATA BASES

  45. DATA BASES

  46. LABELLING • Avery labelling system • Adding Class Icons • Add other relevant information • No waste of labels

  47. Chemwatch MSDS data base Subscribe through a school network $100 per year for 4 updates per year Everything from toothpaste to trichloroethane Includes Manufacturers CHEMWATCH Website - http://web.chemwatch.net/chem/ Email - chemwatch@chemwatch.net

  48. CHEMWATCH SAMPLE

  49. MINI MSDS

  50. R.E.S Risk Evaluation Sheets • Available on the website at GSC

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