This Catalyst article investigates the healing of the ozone layer. The ozone layer in the upper atmosphere was damaged by CFCs, used in refrigeration. A ban on their use has allowed the layer to start recovering.

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

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In this Catalyst article, Mike Follows describes the surprising range of thermometers available to scientists today.

Many physical properties of materials depend on temperature. Thermometers are vital for measuring body temperature. The body's biochemical reactions work best at 37°C and the body is in...

This mystery explores solubility, ionic ...

This article discusses how toxic gases gases can be useful in medicine, carbon monoxide is a poisonous gas but it can also help to treat some diseases.

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

Catalyst...

This Catalyst article explains how some gases can be poured, demonstrated by an experiment using carbon dioxide gas.

This article is from Catalyst: Secondary Science Review 2011, Volume 22, Issue 2.

Catalyst is a science magazine for...

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 takes a look at the winners of the Nobel Prize for Chemistry 2012 who revealed how cells communicate.

All functions of the human body require signals to be released, detected by a receptor in the right place and an appropriate response to be mounted. For example, hormones can be...

Students test crystal (alum) deodorants using either a red cabbage indicator or a universal indicator. The universal indicator suggests that the deodorant reacts as an acid, whereas the red cabbage suggests that the deodorant reacts as a base. What is happening here?

This resource can be used with different...

This article discusses how chemical tests can reduce the numbers of animals used in the testing of new products.

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

Catalyst is a science magazine for students...

This Catalyst article describes how the distribution of volcanoes across the Earth’s surface tells scientists about the underlying pattern of tectonic plates. Much can been learned about volcanoes by observing them from orbiting spacecraft.

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This is one of the 14 Background Books published for Stage III of the Nuffield Chemistry Sample Scheme. The books were highly illustrated and designed to be attractive. This book highlights the importance of water and explains key ideas related to its chemistry.

There are five parts to this book:

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This Catalyst article investigates osmosis: when water enters or leaves plant tissue (raw potato) according to the concentration of water in its surroundings.

The article is from Catalyst: Secondary Science Review 2014, Volume 25, Issue 3.

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