This video explains the term spin.  It introduces the idea of a magnetic dipole in electrons and shows how, in an external magnetic field, electron spins can be aligned or opposed (different quantum states).

However, when considering just two electrons coupled together the possible quantum positions becomes...

This infographic for post-16 students explains the different methods of speciation by natural selection. It summarises allopatric and sympatric speciation 

This activity is part of Endeavour, an online collection of inquiry-based teaching resources created by experts...

This is a video that asks young adults their opinion of nuclear power being used in Australia.  90% of Australia’s power derives from coal and gas. There are no nuclear power stations.

The comments from audience could be used to initiate similar discussions for the UK.

This Catalyst article explores the complex structure of cells, and numerous theories of how they were formed. It describes how the development of electron microscopes has allowed greater detail of cellular strutures and organelles to be understood. The article includes detailed electron micropgraphs, along with...

This worksheet in this resource introduces students to the topics of classification and binomial nomenclature. The idea of hierarchy is illustrated, before explaining Linnaeus’s system of classification and the terms kingdom, phylum, class, order, family, genus and species. There is also a useful introduction to...

This video uses two oppositely charged metal plates to demonstrate that a candle flame contains ions. Positive ions are attracted to the negative plate, while negative ions the positive plate. Even when the candle is extinguished, the smoke is attracted to both plates and so must also contain ions.

A multiple choice quiz on medicine for  AS/A level chemistry.

Although it is written for OCR AS/A level chemistry (Salters) H033/H433 course, it can be edited to suit your scheme of work.

A Catalyst article about the naming system used for biological species, devised by Linnaeus. The purpose of biological names is investigated and the article also explains how the naming system works.

This article is from Catalyst: Secondary Science Review 2009, Volume 19, Issue 3.

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The aim of this investigation is to find the value of a number of resistors using a Wheatstone bridge.  Although this is an historical piece of equipment that has been superseded by modern methods it provides an excellent way to understand potential difference in circuits.

This Catalyst article looks at agricultural plants, that are prone to many diseases, and scientists who develop new techniques to fight these diseases.

The video asks students to predict when a bungee jumper experiences maximum acceleration.  The answer is at the very bottom of the jump.  This is often counter-intuitive as the velocity at this point is almost zero. 

However, acceleration is the rate of change of velocity over time, a = ^Δv/_Δt...

This Catalyst article explains why there are many anti-bacterial drugs but few antivirals. There are millions of bacteria everywhere – on skin, in the gut, and on food. Bacteria have been troubling human beings for as long as they have been around, so a lot of effort has been directed into finding ways to fight...

Produced by the Royal Observatory Greenwich, this booklet guides students to use Einstein’s mass-energy equivalence equation to determine when the Sun will become a red giant. Included is an online video that discusses how we can determine how old the Sun is. Details on the relationship between mass and energy in...