Technicians’ advance planning sheet - Nuffield Foundation



-457200-457200Technicians’ advance planning sheetModule C1: Air qualityThis table shows items which may need to be ordered or prepared in advance for this module. It does not list standard items, for example, test tubes, beakers, thermometers etc.Full details of the resources needed for each activity are given in the Requirements section of the Teacher & Technician notes published by OUP, which also include safety information for the activity.ActivityItem(s)Quantity NotesAC1.1.1Transparent empty boxClapper bell in round flaskRubber bung to fit flask1 11Wire the clapper bell to a length of rubber tube and suspend it inside the flask. Do not use wire supports in place of the rubber tubing.AC1.1.2Stain Devil ? may be useful for cleaning test tubes after this activity.AC1.2.1Birthday candlesAt least 15AC1.2.2Test tube of oxygen gas with bung1AC1.2.32-litre plastic soft drinks bottle with the bottom cut offRubber bung to fit the neck of the bottleGlass troughSheet aluminium platformBeer-bottle top, with the plastic insert burnt outBlow torchRed phosphorus1111110.5 gThe sheet aluminium platform should be constructed so that it stands above the level of water when it is resting on the bottom of the glass trough, and the glass trough is half filled with water. It needs to fit inside the plastic bottle.Burn out the plastic from inside the bottle top in a fume cupboard.AC1.3.1Diet colaMentos mintsPaper tubeSquare of card2-litre bottle1 packet11The paper tube should be just long enough to hold a packet of mints and just wide enough so that the mints to stack up on top of each other but slide through the tube easily.AC1.3.3Journal cards4 per pair from activity sheetAC1.4.1Roll sulfurAcid-base indicator solutionParaffin1 < 0.5 cm cube1 bottleFew cm3AC1.5.1A variety of timing devices1 per pairTiming devices might include digital stop clocks and older analogue stop clocks. It is important a range of different timing devices are used.AC1.5.2Small pieces of broken pottery2 per groupAC1.5.3Double sided sticky tape1 rollAC1.7.1Solid fuelsLiquid fuelsTin lidsFew small piecesFew cm32Ensure tin lids have previously been heated to remove any volatile coatings.AC1.8.1Potassium chlorate (V) (reagent grade)Jelly babyOxygenCharcoal15 g1 per demonstration1 tube per group1 small piece per groupAC1.9.1EthanolFew cm3AC1.9.2500 ml plastic soft-drink bottlewith base removed Washing-up liquidGlycerol Propan-2-ol 18 cm34 cm350 cm3AC1.9.3Anhydrous copper sulfate or cobalt chloride paperFuel to burn1 container1 pieceFew cm3-457200-457200Technicians’ advance planning sheetModule C2: Material choicesThis table shows items which may need to be ordered or prepared in advance for this module. It does not list standard items, for example, test tubes, beakers, thermometers etc.Full details of the resources needed for each activity are given in the Requirements section of the Teacher & Technician notes published by OUP, which also include safety information for the activity.ActivityItem(s)Quantity NotesAC2.1.1Digestive biscuitPolythene webbing that holds four-pack drinksFruit jellyCeramic house brickSteel toolLengths of thick wooden dowelCopper wire, steel wire, nylon filament, rubber bands3 cm x 10 cm samples and about 0.5 mm thick: sheet copper, steel, polythene, pottery, glassLarge iron nail (blunted)3 cm x 5 cm samples: sheet copper, steel, polythene, pottery, glassLarge iron nail, larger samples of materials roughly same volume, brass weight, lump of lead, solid rubber ball, objects made of porcelain0.5 cm x 0.5 cm samples: sheet copper, steel, tin, polythene, pottery, glass11111Few piecesSeveral of eachSeveral of each2 or 3Several of eachSeveral of eachSeveral of eachSteel tool could be a chisel, screwdriver or hammer.AC2.2.1ABS: Lego bricks, casing for laptops, car bumpers, dashboards, hub coversAramid: golf club handles, tennis racket frame, bullet proof vests (as Kevlar)Polyamide (nylon): racket strings, fishing line, curtain rail fittings, some plastic hinges, toothbrush bristles, zipsPMMA (acrylic/Perspex): cover of car rear light, bathroom fixtures, lensesPolycarbonate: mobile phone cases, CDs, and DVDs, camera body, lenses Polyester: bottles for carbonated drinksPolythene: carrier bags, food bagsPolypropylene: suitcases, car dashboards, bottle tops, crisp and sweet bags, casing for some electric kettlesRubber: rubber gloves, tyres1 example1 example1 example1 example// continued1 example1 example1 example1 example1 exampleThis could be set up once to be stored and used every year. Objects and photos of objects could be used for each example of polymer.AC2.3.1Range of objects made from different polymers, e.g. rope (nylon), plastic bag (polythene), clothing (PVC, polyester), polystyrene (cassette/CD case), electrical insulation (PVC) Strings from a musical instrument, nylon fishing line, sewing threads made of different materials.Samples of plastic film cut from bags and packaging material. Packaging material from sweets, crisps and other foods.Flat style clothes hangers, CD cases, plastic rules.Several samples of each AC2.3.2Samples of various types of thin sewing thread1 reel of each typeAC2.6.1Propan-2-ol, or other anhydrous alcohol eg ethanolPolyox [high molecular weight poly(ethylene oxide), relative molecular mass about 4 x 106]Food colouring or fluoroscein (optional)String of ‘Christmas beads’ – shiny beads for decorating Christmas trees (optional)40 cm33 – 4 gFew cm32Polyox is available from MUTR or Aldrich.One of the strings of ‘Christmas beads’ should be cut into individual beads.AC2.6.2Molecular model kits Paperclips, 2 coloursHexane-1-6-diamineDecanedioyl chlorideCyclohexane50 % aqueous ethanol10 of each colour per group4.4 g3 g100 cm320 cm3Exact quantities of chemicals will depend on the number of groups – each pair needs about 5 cm3 of each solution.If a demonstration is used instead of a class practical, smaller quantities of chemicals are needed.AC2.7.1Butane gas (in a cylinder for a gas lighter)Paraffin (fuel) Candle wax and polythene111AC2.7.2Reaction vessel: a large, round plastic bottle, as used in workplace water dispensers.Ethanol, or propan-1-ol, or propan-2-olMethanol140cm340cm3The reaction vessel must have a volume of 16 – 20 dm3. It must be made of poly-carbonate (marked PC) and of no other material. It must be completely dry before use.AC2.8.1Plastic medicine spoon, 5 cm3Borax (sodium borate)PVA glueGlycerolFluoroscein dye or food colouring (optional)1 per group0.8 g per group40 cm3 per group5 cm3 per groupFew cm3AC2.8.2Natural rubber latexVinegar, or citric acid solution, or lemon juiceAbout 50 cm3About 50 cm3If rubber latex cannot be found, Copydex can be used instead.AC2.9.1Candle wax, polythene, high density polyethylene (HDPE): supermarket carrier bags (rustle when you crush them), low density polyethylene (LDPE): department store carrier bags (the softer kind), unvulcanized rubber: a film made by coating a microscope slide with Copydex adhesive and allowing it to dry, vulcanised rubber: brown elastic band, plasticized PVC: a squeezy toy, wire and cable insulation, watch strapSeveral samples of eachAC2.9.2Large bars of chocolate2Prior to the lesson, one bar of chocolate is melted while in its wrapper, cooled in the fridge, then returned to room temperature. The other bar is kept at room temperature.AC2.10.1Crude oil substituteMolecular model kitLarge transparent bowl, bucket or beakerAbout 6 cm311For crude oil substitute recipe see guidance sheet.AC2.11.1Powdered milk1 cm x 1 cm x 1 cm solid cubes1 container8Tesco’s own brand powdered milk works well, but not all brands are as effective for this demonstrationThe maths department may have a supply of solid cubes if the science department hasn’t.AC2.11.2Jelly cubes2 per pairAC2.12.1Large coffee tin (500 g catering size) with metal lidCandle (short piece or tealight)Conflour, dry11Few g per demonstrationPrepare the apparatus as shown on the guidance sheet prior to the lesson.Dry conflour in an oven.-457200-457200Technicians’ advance planning sheetModule C3: Chemicals in our lives: Risks and benefitsThis table shows items which may need to be ordered or prepared in advance for this module. It does not list standard items, for example, test tubes, beakers, thermometers etc.Full details of the resources needed for each activity are given in the Requirements section of the Teacher & Technician notes published by OUP, which also include safety information for the activity.ActivityItem(s)Quantity NotesAC3.1.1Model Earth, made from a strong bar magnet (about 7 cm long) hidden centrally in a sphere of PlasticineTM of approximately 12 cm diameter, and supported by a plastic rodMagnaprobe, or a sewing machine needle magnetised and suspended on a piece of sewing thread.Used matchsticks11Approx. 8Toothpicks could be used instead of used matchsticks.AC3.1.2Climate Through Time posters1 per group of 8 studentsThe posters can be ordered free form the British Geological Survey.AC3.2.1TrayDry sandGravel and small pebbles (various sizes)Talcum powder, or a similar fine harmless powderDrinking straws, or the barrels of pens with the ink tubes removed1 per groupA mixture of sand, gravel, and talcum powder enough to about ? fill each tray1 per studentAC3.4.1Food labels (possibly photocopied from packets) covering enough examples for students to estimate their total salt intake in one daySalt pot with table saltA wide selection1AC3.5.1Castor oilEthanolSodium hydroxide solution (5M)Sodium chlorideAbout 5 cm35 cm310 cm310 gAC3.5.2Universal indicator paper and colour chartHydrated sodium carbonate crystalsCalcium hydroxideDilute hydrochloric acid (2M)1 book per group1 container per group1 container per group1 container per groupAC3.6.1Concentrated sulfuric acidSodium chlorideUniversal indicator paperIron sulfide, or sodium sulfideHydrochloric acid (5M)Sodium chlorate(I) solution (14%)Blue litmus paper10 cm320 g1 bookFew gAbout 20 cm3About 50 cm3Few stripsAC3.7.1Electrolysis cellSodium chloride solution (30 g/dm3)Universal indicator paper1 per group100 cm3 per groupFew strips per groupSee guidance sheet for details of the electrolysis cell. ................
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