Published by the Nuffield Foundation this Revised Nuffield Advanced Biology Practical Guide is linked to chapters 22 - 25 of Study Guide II. Technical information and notes for teachers about the practical activities is given in ...

Published by the Nuffield Foundation this Revised Nuffield Advanced Biology Practical Guide is linked to chapters 26 – 29 of Study Guide II. Technical information and notes for teachers about the practical activities is given in...

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Produced by Solar Spark, this is a simple practical activity that can be used to show how a solar photovoltaic cell works. During a 45-60 minute session, students make solar cells out of cheap and readily accessible materials. The mechanism behind the solar cell is similar to that used in a dye-sensitised solar...

Produced by Solar Spark, this activity looks at the relationship between light and absorption in solar cells. Using a photovoltaic cell and different colour acetate sheets, it demonstrates the ability of solar cells to absorb at different wavelengths of the electromagnetic spectrum and shows how the more it can...

These resources from NASA look at why telescopes are put into space. Students build simple spectroscopes and telescopes to learn the answer to this question. This educator guide is divided into units of study that include science demonstrations, lesson plans and student sheets so that students may learn about Earth...

This Unilever Laboratory Experiment, published in 1967, describes an experiment to measure the contraction of hair in a hot solution of phenol. The procedure is based on a school-made apparatus to measure the changes of length. The results are discussed in terms of hydrogen bonding and disulphide bonds between...

Several different treatments are used to autolyse yeast cells. The viability of the autolysed yeast is then tested by: plating out on agar; testing for dehydrogenase activity; microscopic examination with methylene blue.

In this activity, students investigate the three main types of memory - sensory, short-term and long-term. An explanation is given for each one and linked to a memory experiment. Students are also given five memory tasks to complete which include looking at factors that affect peoples' memories and ways in which to...

Details of this challenging experiment were published in this leaflet from the Unilever Laboratory Experiment in 1965. Requirements included a pyrophoric nickel catalyst supplied by Unilever, hydrogen from a cylinder and a vegetable oil treated with activated charcoal to remove impurities. The necessary apparatus...

This Unilever Laboratory Experiment describes the preparation of soap from a mixture of cooking oil and dripping. The leaflet was first published in 1964 and so lacks modern safety guidance. The procedure is authentic; it is designed to produce a convincing sample of soap. This means that it could be the basis of...

The method of preparation of a sulphonate paste described in this Unilever Laboratory Experiment is basically the same as that used by Unilever in the large-scale production of soapless detergents at the time of publication in 1964. The required reactants included an alkylbenzene hydrocarbon supplied by the...

This Unilever Laboratory Experiment, published in 1969, gives the procedure for using corrosion (ferroxyl) indicator to demonstrate anodic and cathodic areas on the surface of steel as it corrodes.

In this practical protocol students investigate one way in which bacteria acquire antibiotic resistance through conjugation - horizontal gene transfer from one bacterial strain or species to another.

Plasmid-mediated evolution is fast because whole functional ‘modules’ are lost and gained, rather than the...

This Unilever Laboratory Experiment, published in 1970, describes the analysis of fluorescers from soap and soapless detergent powders. The procedure describes how the fluorescers can be extracted from the product, separated by thin layer chromatography techniques, and made visible by exposing the chromatograms to...