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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This Catalyst article is about a micro-hydroelectric power station on a river in Yorkshire. As oil prices soar and global warming threatens, the need for affordable green solutions to the energy crisis is ever increasing. Giant hydroelectric power stations, such as the Three Gorges Dam in China, will help to fulfil...

This Catalyst article describes how the salty water in the oceans has some consequences for how the ocean water mixes – or does not mix. There are distinct bodies of water in the oceans which mix only very slowly. The experiments detailed in the article will explain why this is.

The article is from Catalyst...

A Catalyst article looking at renewable energy. To tackle climate change and all the challenges imposed by the need to find alternative and reliable energy sources, there is one major resource that has remained untapped until now: wave power. This article describes the size of this resource and presents the leading...

A Catalyst article about whaling. During the last century whales were hunted and killed by many nations for the valuable materials they provided. Whale populations collapsed as a result. The article looks in detail at this example of human impact on the environment and details whale populations throughout the world...

This Catalyst article explains the use of stem cells to treat medical problems, and outlines new possibilities for the use of adult stem cells in treatment.

Currently, stem cells used for treatment are embryonic stem cells, since they have the ability to form any cell type in the body. The example of the use...

This article from Catalyst looks at aurora borealis caused by the interaction of the solar wind with the Earth's magnetic field. It also explains how satellites are testing thoeires of how this happens. Auroral light emission occurs at roughly 100 km altitude. Energetic electrons in the solar wind cause the...

This Catalyst article looks at Biochemistry, the study of chemical reactions in living things, exploring how it differs from other biological subjects and how examples can be found in everyday life.

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

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A Catalyst article about the many roles of chemists at work. The links with biology, physics and geology are examined as are many other subjects. The article looks at some of the areas in which chemists work and it explores what makes it distinctive from other sciences.

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Geothermal energy is the heat produced by decay of radioactive isotopes deep within the Earth. The temperature at the centre of the Earth is thought to be around 5,000°C, with the temperature reducing toward the surface. It is estimated that 99.9% of the planet is above 100°C. Geothermal energy is considered a...

With so many research groups across the world, it can be difficult for scientists to keep on top of the latest developments and findings. As well as publishing in journals (such as Nature or Science), researchers communicate their results at scientific conferences. These range in size from small, specialist...

This Catalyst article discusses what physics is. Physics is a subject which seeks to answer fundamental questions about the nature of matter and the Universe in a self-consistent way.

The article is from Catalyst: Secondary Science Review 2015, Volume 26, Issue 1.

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This Catalyst article explores where Science Communication came from, how it has grown and why it has an important role to play in helping people to learn about science.

On one level Science Communication is about communicating science and building bridges between the people involved in scientific research...

This Catalyst article explores analytical science which is the branch of chemistry concerned with determining which substances are present in a sample and how much.

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

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