Bacteria are one of the simplest forms of independent life with no nucleus or membrane bound organelles. These animations, from the Wellcome Trust, show that, despite this apparent simplicity, bacterial diseases pose a profound threat to world health. The animations are suitable as a lesson starter, to introduce...

This Catalyst article explains the way scientists work, how they conduct research and look for patterns in data. It also investigates what can go wrong during the process of spotting patterns in the collated information.

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This resource from Wellcome Trust Sanger Institute is a practical, classroom activity that allows the students to make a balloon model of a disease-causing bacterium. This illustrates its basic shape and structure. Students can choose from three bacteria species...

The Big Picture on pages 10-11 of this issue of Catalyst shows scientists in Antarctica launching a balloon which will travel up through the atmosphere to a height of 34 km above the Earth’s surface. This balloon is part of NASA’s BARREL mission, probing the radiation belts which surround the Earth.

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This article from Catalyst looks at the ageing process in bananas. As bananas age, spots develop on their skins. These contain fluorescent substances which can be seen with a UV torch.

The article is from Catalyst: Secondary Science Review 2014, Volume 25, Issue 2.

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This resource looks at the concept of a centre of mass, for a rotating body, or barycentre, using the principals of moments.  An demonstration activity is suggested, using tennis balls secured together will string.  A video linked to this activity is performed on the International Space Station, by ESA Astronaut,...

This 3D video journeys into the human cell revealing base pairs.

This manual, from the Microbiology Society, provides a basic introduction to microbiology, aseptic technique and safety.

Part 1 of the book includes information on good microbiological laboratory practice, equipment, preparation of culture media, sterilisation and disinfection, inoculation, aseptic technique...

A multiple choice quiz on basic chemical concepts and hydrocarbons for A/AS level chemistry.

Although it is written for...

A Catalyst article about biologists looking for patterns in the distribution of barnacle species on the sea shore. Barnacles are arthropods which live as tiny larvae in the sea and then cement themselves, head down, on suitable rocks, build a shell, poke their legs out of the top of it and start to filter feed. The...

A Catalyst article about Darwin's travels on the Beagle which gave him ideas about evolution. Darwin spent almost five years on board HMS Beagle as it sailed around the world. The purpose of the voyage was to map navigation channels around the coast of South America. Darwin was the ship’s naturalist and companion...

This video introduces an interesting problem of two balls placed in beakers of water.  A ping pong ball is fixed to the bottom of one beaker of water and an acrylic ball suspended into another beaker of water.  Both beakers contain the same amount of water and both balls displace equal amounts of water (they have...