Catalyst Volume 21 Issue 4

This issue of Catalyst includes the following articles:

Science on the Western Front 

Archaeologists are using many aspects of science to identify the remains of soldiers who were killed in the First World War.

Cloud Control 

This article explains how meteorologists use a variety of techniques to seed clouds and induce rainfall.

Try This: Make Your Own Cloud

A practical experiment to make water vapour condense so that it forms a 'cloud in a bottle'.

Splitting Light: Spectroscopy 

The study of the wavelengths of light which enables scientists to identify the substances present in the source.

Try This - Make Your Own Spectrometer 

A description of how to make a basic spectrometer to analyse light, using a CD to split the light.


This article looks at the use of plant cells to generate electricity via photosynthesis.

Energy Control 

The article describes a new design of thermostatic controller which saves energy by learning the consumer's pattern of usage.

How Smart is an Ant? 

This article investigates how ants find their way around. It also explains how the methods for conducting the research are devised and tested.

Tiny Particle, Giant Detector - Neutrinos 

The article looks at a giant spectrometer which is being used to measure the mass of the tiny particles called neutrinos.

Catalyst is a science magazine for students aged 14-19 years. Annual subscriptions to print copies of the magazine can be purchased from Mindsets.



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Science on the Western Front

In this Catalyst article the work of archaeologists working on the graves of World War One (WWI) victims is described. The total number of military dead in WWI is estimated at 8.5–10 million. In the mud and confusion, many of the dead did not have proper burials. Many temporary graves were destroyed by later...

Cloud Control

A Catalyst article about climate control, and specifically the process known as cloud seeding. Cloud seeding has met with initially encouraging results. The method entails adding silver iodide to the air in clouds to encourage ice crystals to form, so that they grow rapidly and produce more snow or rainfall than...

Try This - Make Your Own Cloud

In this Catalyst article an experiment is described in which the formation of clouds can be replicated. The experiment requires nothing more than a plastic bottle, warm water, matches and a small thermometer.

This article...

Splitting Light: Spectroscopy

A Catalyst article looking at which type of radiation is absorbed and emitted through spectroscopy. This is the study of the wavelengths of light which allows us to identify the substances present in the source. This investigation provides a lot of useful information about a compound. It is used in a very wide...