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Showing 468 results
A Catalyst article about what causes faults in electrical appliances and the wiring installations in homes, and why people receive electric shocks. How regulations can reduce the risk of electrical faults and electric shocks is also examined together with the use of fuses, fuse wire and modern RCDs (residual...
A Catalyst article about the UK's extremely reliable electricity supply system generated in power stations which burn gas or coal, or use nuclear fuel. The article looks at how this is achieved using high voltages and how the demands for power at different times of the day and year are met.
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This Catalyst article looks at harlequin ladybirds, just one of the invasive species that has spread through Western Europe. Over the last century there has been a dramatic increase in the movement of so called alien species around the world as a consequence of international trade and travel. Invasive alien species...
A Catalyst article about the efficient use of heating systems. Many people complain of being too hot or cold. Coming soon are a new generation of intelligent heating controls which can learn how people live, and then deliver heating efficiently when and where they need it. These devices are known as Wattboxes and...
A Catalyst article devoted to food chains. This article looks at photosynthesis and the loss of energy from plants to animals throughout the food chain. How this limits the number of animals that can survive on the energy fixed by a patch of vegetation is explained. Foraging characteristics and how many animals can...
A Catalyst article about how the society can decide whether energy-efficient lighting is good for the environment. With the UK Government announcement that sales of filament lamps will be phased out over the next few years the article examines their replacements, CFLs, compact fluorescent lamps. Not everyone agrees...
A Catalyst article explaining how enzymes allow chemical reactions in all living organisms to proceed quickly, under conditions where they would normally be very slow. By isolating enzymes that could be used to catalyze reactions, scientists have started a major biotechnology industry. The article describes how...
Since the discovery of antibiotics, many people believe that the pathogenic microorganism threat to the population has been removed, with fatal infections and infectious diseases brought under control. This has discouraged research into drugs containing natural compounds such as essential oils. However, humans are...
Take a look at the summary evidence behind the use of palm oil, a fat tax and biofuels and debate the pros and cons. |
A Catalyst article looking at the evidence for evolution and which considers the ongoing conflict between scientists and creationists. The work of Charles Darwin is central to the article which summarises his theory of natural selection and also covers creation myths and creationists.
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A Catalyst article looking at the benefits of exercise and how it affects bone structure and hence physical fitness. Furthermore, obesity in Britain is on the rise and so the population is encouraged to do regular exercise, not only for cardiovascular and respiratory health, but also for general well-being. But...
Exploiting the lack of gravity in experiments carried out in space can yield information that might take much longer to find on earth on earth, but how is it achieved? |
A Catalyst article about the hunt for an explanation of inheritance. The role of chromosomes was announced in 1903 and the structure of DNA was revealed in 1953, both of which were major scientific breakthroughs in this field of research. This article examines the history of inheritance.
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A Catalyst article about careers in geological exploration. The article contains a case study about an exploration geologist and looks at an undergraduate degree course in exploration geology.
This article is from Catalyst: GCSE Science Review 2007, Volume 17, Issue 4.
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This booklet, from Science Community Representing Education (SCORE), offers a range of practical activities for use in the classroom. Most are aimed at Key Stage Three and Four and Post-16 students but a small number are provided for Key Stage Two to highlight the...