Impact of data loggers on science teaching and learning - European ...

<strong>Impact</strong> <strong>of</strong> <strong>data</strong> <strong>loggers</strong> on science teaching and learningTitle Learning Description <strong>of</strong> activities Duration MaterialObjectives(sensor)Freezing andmelting <strong>of</strong> waterInvestigation <strong>of</strong>the freezingand meltingtemperatures<strong>of</strong> waterFreezing is the process <strong>of</strong> matter turningfrom the liquid state into the solid state.Melting is the process <strong>of</strong> solids turning intothe liquid state. This occurs at the so-calledfreezing or melting temperature pointsrespectively. In this experiment, pupilsinvestigate the freezing and meltingtemperatures <strong>of</strong> water according to obtainedgraphs and compare them with one another.90’2temperaturesensorsEndothermicreaction -Reaction <strong>of</strong>Citric AcidSolution withBaking SodaStudy andexplainendothermicreactionAn endothermic process is a chemicalreaction in which heat is absorbed. When weperform an endothermic reaction in a flask,it initially cools. Later, heat from thesurroundings flows into the flask untiltemperature balance is established.In this experiment pupils will followtemperature changes occurring during thereaction between citric acid solution andbaking soda. The students will followtemperature changes occurring during thereaction.45’1temperaturesensorAcid rainStudy andexplain the acidrainphenomenonAcid Rain is rain, snow or fog that is pollutedby acid in the atmosphere and which, when itfalls, damages the environment. Acid rain ismeasured using a scale called pH. The lowera substance’s pH, the more acidic it is. Purewater has a pH <strong>of</strong> 7.0. Normal rain is slightlyacidic because Carbon Dioxide dissolves intoit resulting in a pH <strong>of</strong> about 5.5. The studentswill compare the acidity <strong>of</strong> rainwater to theacidity <strong>of</strong> tap and distilled water.45’1 pH sensor13