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Schouten, Peter W.; Sharma, Ashok; Burn, Stewart; Goodman, Nigel; Parisi, Alfio; Downs, Nathan; Lemckert, Charles – Teaching Science, 2013
The emissions of various types of greenhouse gases (GHGs) from natural and industrial sources are undergoing a great deal of scrutiny around the world. The three main GHGs that are of most concern are carbon dioxide (CO[subscript 2]), nitrous oxide (N[subscript 2]O) and methane (CH[subscript 4]). CO[subscript 2], N[subscript 2]O and CH[subscript…
Descriptors: Science Laboratories, Science Instruction, Laboratory Equipment, Scientific Concepts
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Downs, Nathan; Larsen, Kim; Parisi, Alfio; Schouten, Peter; Brennan, Chris – Teaching Science, 2012
A practical exercise for developing a simple cost-effective solar ultraviolet radiation dosimeter is presented for use by middle school science students. Specifically, this exercise investigates a series of experiments utilising the historical blue print reaction, combining ammonium iron citrate and potassium hexacyanoferrate to develop an…
Descriptors: Chemistry, Foreign Countries, Science Curriculum, Investigations
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Downs, Nathan; Parisi, Alfio; Powell, Samantha; Turner, Joanna; Brennan, Chris – Teaching Science, 2010
A technique has previously been described for secondary school-aged children to make ultraviolet (UV) dosimeters from highlighter pen ink drawn onto strips of paper. This technique required digital comparison of exposed ink paper strips with unexposed ink paper strips to determine a simple calibration function relating the degree of ink fading to…
Descriptors: Academic Achievement, Secondary Schools, Elementary Schools, Comparative Analysis
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Turnbull, David; Parisi, Alfio; Downs, Nathan – Teaching Science, 2010
Australia has one of the highest rates of incidence and mortality due to skin cancer in the world. Exposure to the sun also has a beneficial side. The beneficial effects are relatively few, but they are essential to a person's well being. It is well known that exposure to small amounts of UV radiation are beneficial for the human body and…
Descriptors: Investigations, Well Being, Cancer, Radiation
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Downs, Nathan; Parisi, Alfio – Teaching Science, 2010
A method is described for building a cost effective digital circuit capable of monitoring the solar radiation incident upon a remote solar cell. The circuit is built in two sections, the first, digitises the analogue voltage produced by the solar cell at a remote location and transmits the received signal to the second receiver circuit which…
Descriptors: Radiation, Science Instruction, Science Activities, Computer Uses in Education
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Schouten, Peter; Parisi, Alfio; Downs, Nathan – Teaching Science, 2009
The measurement of solar UV under water is not a simple process. In the underwater environment the difficulty of obtaining useable data is greatly amplified due to the optically complicated and at times unpredictable nature of water itself. The following practical exercise designed for use in the Year 11 and Year 12 Physics classroom aims to…
Descriptors: Optics, Physics, Science Instruction, Secondary School Science
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Downs, Nathan; Parisi, Alfio; McDonnell, Brendan; Thornton, Peter – Teaching Science, 2008
The article presents a technique to measure the ultraviolet index using a personal hand-held ultraviolet meter to illustrate concepts of physics. Measurements of the erythemally effective (sun-burning) direct solar beam, diffuse skylight, and total global ultraviolet irradiance are converted to daily ultraviolet index measurements. Daily…
Descriptors: Measurement Techniques, Prediction, Physics, Elementary Secondary Education
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Downs, Nathan; Turner, Joanna; Parisi, Alfio; Spence, Jenny – Teaching Science, 2008
A technique for using highlighter ink as an ultraviolet dosimeter has been developed for use by secondary school students. The technique requires the students to measure the percentage of colour fading in ink drawn onto strips of paper that have been exposed to sunlight, which can be calibrated to measurements of the ultraviolet irradiance using…
Descriptors: Secondary School Students, Measurement, Foreign Countries, Light