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Technicians’ lists of equipment Downloaded from www.catalystscience.co.uk Lesson B1: Food for energy Starter activities Capture interest Teacher demonstration: three 2.5cm 10cm strips of thin cardboard three 5 cm pieces of 12 mm diameter copper tubing scissors 1m of thin copper wire aluminium foil sticky tape three lemons (labelled 1, 2 and 3) 1.5V LCD clock metal paper clips Main activities B1b Hands up! Stopwatch B1c Exercise and your heart rate For each group: stopwatch computer with spreadsheet Lesson B2: Everything respires Main activities B2a Do plants respire? Expt A: Do cress seeds need oxygen to germinate? two 250cm3 conical flasks two split bungs two 10-cm lengths of cotton two balls of cotton wool soaked in water and dipped into a tray of cress seeds 100cm3 of water 100cm3 of alkaline pyrogallol Expt B: Do peas produce carbon dioxide? three test tubes one straw five germinating peas 3cm3 bromothymol blue indicator Expt C: Do plant leaves produce water? two leaves (preferably from a privet hedge) two pieces of cobalt chloride paper two pieces of sticky tape This list is in Microsoft Word, so it can be customised to fit each school’s requirements. 1 Technicians’ lists of equipment Downloaded from www.catalystscience.co.uk tweezers Expt D: Do peas release energy as heat? two vacuum flasks two plugs of cotton wool 15 germinating peas 15 dry peas two thermometers two bosses and clamp stands B2b Which part respires most? For each group: three conical flasks and bungs three 10-cm pieces of cotton three muslin sheets (10cm 10cm) limewater one plant cut up into small pieces of leaf, root and stem [a geranium would be fine, although you could use rapid cycling brassicas (available from Science and Plants for Schools)] access to an electronic balance Lesson B3: Breathe in and out Starter activities Problem solving 1 box of matches pile of coins 5cm high shallow dish that resembles a wide pub ashtray (it must hold 150ml of water not more than 5cm deep and have a flat bottom) pint glass (or equivalent with an even rim) Main activities B3a Air in and out For each group: two test tubes with delivery tubing and bungs (see Core sheet) access to limewater thermometer tweezers two 1cm2 pieces of cobalt chloride paper two gas jars access to a large bowl rubber tubing B3b Dissection of the lungs For teacher demonstration: one set of lungs (with trachea and diaphragm attached) This list is in Microsoft Word, so it can be customised to fit each school’s requirements. 2 Technicians’ lists of equipment Downloaded from www.catalystscience.co.uk dissecting board or tray scalpel scissors (large and small) mounted needle coarse forceps fine forceps Lesson B5: Trouble with yeast Starter activities Bridging to the unit boiling tube paraffin oil yeast suspension in 5% glucose solution warmed until bubbling delivery tubing test tube with 2cm depth limewater. Main activities B5a Is yeast a chemical? For teacher demonstration: 15g baker’s yeast mixed with 300ml water and 300ml 0.2M glucose solution (leave on a radiator for 20 minutes to start bubbling before the lesson) 500ml beaker Bunsen burner tripod heatproof mat gauze This list is in Microsoft Word, so it can be customised to fit each school’s requirements. 3