An ideal companion to the highly successful Science for GCSE: Double Award, this handbook offers topic summaries and numerous practice questions of three different styles. Full answers are provided.

Like the Deflection tube investigation this allows A-level students to measure the specific charge for an electron. It provides a step-by-step guide, along with the calculations that are required to find this measurement.

This resource has been provided by Keith Gibbs.

The greatest achievement of science in the twentieth century ... It will be an enormous success, and deserves to be so - a classic in the sense it will go on being read' - Sir Peter Medawar Francis Crick and James...

A series of images representing double helix images.

• DNA double helix and sequencing output: molecular model of a DNA double helix showing the individual atoms (apart from hydrogen) as coloured balls. Carbon atoms are in white, oxygen in red, phosporus in purple and nitrogen in blue....

In these 4 lectures, HHMI president and Nobel laureate Thomas R. Cech explains the role of RNA in cellular biology. He also discusses other implications of RNA catalysis. Lectures were given in 1995.

Act 1

A video shows two pairs of sunglasses, each with 50%...

This kit and their associated resources are designed to help teach about double-slit and diffraction patterns.

Before teaching this, students should:

• be familiar with constructive and destructive interference;
• be aware that we get diffraction when a wave travels through a gap;
• ...

Produced by Science & Plants for Schools (SAPS), the investigations suggested in this resource use duckweeds. These seem to be simple plants - small, green, and with no flowers. However, this simplicity makes them ideal experimental organisms for investigations into...

An exciting and colourful resource to enhance and reinforce the understanding of basic mathematical calculations and number sense. Presents calculation problems and step-by-step guides that explain how to solve them...

A Catalyst article about Charles Darwin's home and in particular his study which is open to the public. Visiting information is included in the article which puts into context the importance of this room in his work.

This article is from Catalyst: GCSE Science Review 2007, Volume 17, Issue 3.

...

Join Turtle as he dives deeper and deeper into the ocean - what surprise...

This Catalyst article looks at how people lived in the past, archaeologists look at the items (artefacts) these cultures left behind. Using chemical analysis of residues in the artefacts an enormous amount of additional information can be gleaned. This article investigates early dairy farming. Analysis of tiny...

From the Microbiology Society, this resource contains information about biofilms. These are communities of microbial cells attached to a surface. For example, the slime lining plugholes and drains or the rough deposit that can coat teeth at the end of the day. The information clearly describes: * What are biofilms...

This item is one of over 25,000 physical resources available from the Resources Collection. The Archive Collection covers over 50 years of curriculum development in the STEM subjects. The Contemporary Collection includes all the latest publications from UK educational publishers.