Catalyst Volume 21 Issue 1

This issue of Catalyst includes the following articles:

Ocean Iron Fertilisation 

This article investigates whether adding iron to the oceans could reduce global warming.

Solar Surface 

The article looks at sunspots and what they can reveal about the nature and activity of the Sun.

Biofuels from Waste

The use of bacteria to convert waste biological materials to useful fuels is the main subject of this article.

Antibiotics on a Plate

Bacterial colonies produce antibiotics; this article explores how the growth of bacterial colonies depends on the medium they grow on.

Exercise: Working It to the Bone 

An investigation into how regular exercise improves cardiovascular and respiratory health, as well as general well-being. But what effects does exercise have on bones, and why is this so important?

On Screen: Physics and Computer Games 

This article describes how computer games make increasingly sophisticated use of the laws of physics to produce convincing on-screen effects.

Make Your Own Elastic Band 

The article shows how to make an elastic band starting from Copydex, a source of rubber latex.

The Many Faces of Biology 

The great variety of biology-related courses in universities is the main focus of this article.

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