This issue of Catalyst contains the following articles:

The Most Accurate Thermometer in the World

This article looks at how a highly accurate thermometer measures temperatures by finding the speed of sound in a gas.

Practical Action is a development charity which uses simple technology to fight poverty. The learning resources in this collection look at how issues such as climate change and the need for renewable energy can be tackled. The resources contain background information, teachers' packs, classroom activities, stimulus...