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Instructions to make a novel and inexpensive general colorimeter using LEDs. We would welcome feedback from users.
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This document contains:An outline of colorimetryThe principles of the CLEAPSS colorimeterUsing a CLEAPSS colorimeter which has been set upSetting up the CLEAPSS colorimeterproducing a calibration curv.. more
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Explains laser classification and hazards. Describes the  lasers that are permitted in school science and the range of relevant practical work. Also desribes common devices which use lasers and how th.. more
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This doocument provides step by step guidance to build physics apparatus to determine Planck's constant. The result is similar to equipment available from Phillip Harris (order number: B8H29024) whi.. more
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Many esters have distinctive odours, which has led to their use as artificial flavourings, perfumes and fragrances. Many occur naturally but some are now manufactured industrially. The methods outlin.. more
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Make you own colorimeter, using some Lego and LED's.
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You can demonstrate that hot glass is an electrical conductor (hot glass is actually an example of a solid electrolyte). This is counterintuitive because at room temperature, glass is a good electrica.. more
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Instructions on how to make a low cost Arduino-controlled light gate.  See accompanying zip file GL226a for the Arduino code. 
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To help students understand how cell membrane integrity is affected by the environment surrounding the cell. Beetroot membranes are a good model for investigating this because the pigments that diffus.. more
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Instructions on how to make a conductivity indicator for chemical solutions and materials.
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Showing results 1 to 10 of 98
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