This Catalyst article investigates how honeycomb (cinder toffee) is made using a thermal decomposition reaction to produce the gas bubbles. Sodium hydrogen carbonate (also known as sodium bicarbonate or bicarbonate of soda) has the chemical formula NaHCO3. When it is heated above about 80°C it begins to break down...

This Catalyst article presents an activity in chromatography, which can be used to separate the different dyes used in coloured inks.

This article is from Catalyst: Secondary Science Review 2017, Volume 27, Issue 3.

Catalyst is a science...

Two animations, from the Wellcome Trust, illustrate the life cycle of the trypanosomiasis protozoan parasite. They illustrate the journey of these single celled parasites, which cause human African trypanosomiasis or sleeping sickness, from the gut of the tsetse fly...

This fact sheet from the Geological Society explores what tsunamis are, what causes them, and how warning systems and education can help mitigate the damage caused and loss of life.

From the Wellcome Trust, this animation shows how the human immune system attempts to contain a tuberculosis infection and how the bacteria are transmitted to new people.

Tuberculosis usually affects the respiratory...

With an increase in tuberculosis (TB) throughout the world during the 21st century, this resource looks at what scientists are doing to combat a disease that many believed was a problem of the past.

The TB fact file describes the disease, its symptoms and incidence and reviews current research into its cause...

Tunnelworks is a series of teaching and learning resources linking mathematics and science to the Thames Tideway Tunnel project, a major new sewer that will help protect the River Thames from increasing pollution. Background to the project is given in the...

This manual introduces teachers to the approaches adopted in the Problem Solving with Industry series, devised by the Centre for Science Education. The authors describe problem solving as a composite skill, enabling the development of a wide range of personal...

A Catalyst article about one botanist's exploratory expeditions around the world looking for new plant species.

This article is from Catalyst: GCSE Science Review 2004, Volume 15, Issue 2.

Catalyst is a science magazine for students aged...

This article celebrates 25 years of Catalyst and also looks at five big discoveries they have reported on in their 100 issues.

The article is from Catalyst: Secondary Science Review 2015, Volume 25, Issue 4.

Catalyst is a science magazine...

Twig World is an award-winning digital media company offering film-based products via a subscription service.

Twig World films are created specifically for use in schools. Each three-minute film is carefully crafted using world-class documentary footage with input from teachers and prominent academics.

Produced by Solar Spark, this simple activity helps to answer the simple, yet complex question: Why is the sky blue and the sunset red? It's all to do with light scattering and the Tyndall Effect and can be easily demonstrated using a suspension of milk in water.

Milk particles suspended in the water cause...

This Catalyst article introduces Michael Pocock, an ecologist who surveys UK environments and constructs food chains of the species he identifies. The article is from Catalyst: Secondary Science Review 2014, Volume 25, Issue 3.

Catalyst is a...