School Science Review number 312

Number 312 - March 2004

Contents	Article
7	Editorial
8	Letters
11	Science notes
14	Electrolysis of dilute aqueous solutions: are ions ormolecules discharged? Chris Talbot
15	An extension of the burning magnesium experiment John Twidle, Gren Ireson
18	Science notes continued
20	Measurement of air pressure with altitude C. J. Schaschke
31	Building the largest model of DNA in the world Graeme Jones
37	A novel approach to photo synthesis practicals Debbie Eldridge
47	Snail shells and acid rain – an alternative to marblechips and acid Sue Howarth
57	Modelling LASIK in a school laboratory – away from ‘cookbook’ experiments Siu Ling Wong
63	Researchers in Residence put the fun back into science: learning from the fossil record Sarah Earland
71	Mainstream chemical research in school science Peter Hughes
77	Scientific research and school students Nigel Collins
87	Microwave chemistry Gavin Whittaker
95	The transit of Venus: a stroke of luck for teachers Arkan Simaan
101	Ideas, evidence and the transit of Venus Kevin Walsh
107	What makes a student’s science investigation more ‘scientific’? David Lake
113	Using different types of practical within a problem-solving model of science Ros Roberts
121	We don’t do that – it’s not safe any more! Peter Borrows
127	Standards in science key stage tests: how the QCA sets the attainment levels each year Rose Clesham
131	Reviews
140	Notes and news
143	Science websearch
144	Notes for contributors