Resources by Catalyst

Endemic, native, alien

This Catalyst article looks at plant and animal species. Plant and animal species may be endemic, native or alien, this article looks at examples of each on the Galápagos Islands.

This article is from Catalyst: Secondary Science Review 2016, Volume 27, Issue 1.

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Energy Control

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...

Energy Transfer *suitable for home teaching*

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...

Energy-Efficient Lighting

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...

Engineering - Careers

A Catalyst article about careers in the different branches of modern engineering. The article offers an alternative view of engineering focusing on problem solving and making the world a better place to live. Engineers can travel the world working in teams such is the demand for their expertise and much use is made...

Enzymes Outside the Body *suitable for home teaching*

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...

Essential Oils as Antimicrobial Agents

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...

Evolution in the News

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.

This article is from...

Exercise: Working It to the Bone

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...

Explaining Inheritance

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.

This article is from...