audio record
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This video introduces what the courses will entail and what instruments and materials will be received in the home kit, and includes tips on safe usage of them.
Metadata describing this Open University audio programme
Item code: S200; 00; 1972
Published: 1972
Rights Statement: Rights owned or controlled by The Open University
Restrictions on use: This material can be used in accordance with The Open University conditions of use. A link to the conditions can be found at the bottom of all OU Digital Archive web pages.
Duration: 00:24:11
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Producer: Nat Taylor
Contributors: Ian Gass; LJ Haynes; David Roberts; RCL Wilson
Publisher: BBC Open University
Keyword(s): Home kit; Introduction; Second level chemistry course; Second level earth science course
Footage description: Ian Gass with a diagram which shows the structure of the Earth Sciences course. Shot of the earth sciences home experiment kit. Gass points out the contents. He picks out a rock sample and then a sectioned specimen and explains the sort of things students will be asked to do with them. Gass brings out a MacArthur microscope and explains how this is used in the earth sciences course. He points out some of the modifications in the microscope which make it suitable for studying earth sciences materials. Gass demonstrates method for mounting a slide in the microscope for analysis and how to measure angles in specimens. Chris Wilson with a map of Britain, He points out the places in Britain for which students will study geological maps. He holds up a geological map and gives some hints on handling them. Wilson with some geological models. He explains why these will be sent to students and how to assemble them on arrival. L.J.Haynes with the chemistry home experiment kit for the S24- course and the S25- kit. He explains some of the precautions which the student must take in handling these chemicals. Haynes places a few drops of acetone in a dish. He lights the sample with a match to demonstrate the flammability of some of the chemicals. Haynes continues with his warning on the handling of flammable chemicals. Shots, showing organic chemical vapours bursting into flames in the laboratory. Commentary explains how to deal with this, should it arise. Shots of 100 cc of toluene bursting into flame outside the laboratory. A very large and violent fire results. Haynes shows the styrfoam balls which come with the kit and are used to construct molecular models. He then shows other components of molecular models from the kit. David Roberts with a mag. board on which a large chemical formula appears. (Noctane) He shows a model of this molecule which is a more accurate picture of the molecule's structure. Roberts with a model of an iso-octane molecule. He explains the advantages of models in examining molecular structure (Both ball and string and space filling model). Roberts discusses the use of models for examining structure of cyclic molecules (ring molecules). He explains full, abbreviated and skeletal formulation of molecules and shows the models for cyco-hexane. (Both ball and string and space filling models). Modelling of ionic compounds discussed. Shot of a Na Cl model. Shot of a lattice diagram which emphasises the cubic structure of the molucule. Shot of a more accurate model of Na Cl showing Na and Cl ions suspended in space with no bonds between them. Electrostatic force holds them together. Haynes discusses the modelling of inorganic covalent structures. He holds up models of phosphorous pentechloride as an example. Haynes sums up.
Production number: AUDA650A
Available to public: no