This Catalyst article investigates the healing of the ozone layer. The ozone layer in the upper atmosphere was damaged by CFCs, used in refrigeration. A ban on their use has allowed the layer to start recovering.

This article is from Catalyst: Secondary Science Review 2016, Volume 27, Issue 1.

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This video applies physics to explain how trees can move water up their trunks over 10m, which is the natural limit of sucked water. The ideas of transpiration, osmotic pressure and capillary attraction are considered.  The explanation shows how a negative pressure is be obtained from the intermolecular forces and...

The video explores people’s understanding of what light is. A wide range of misconceptions and incorrect ideas are given. Newton thought that light consisted of particles, whereas Huygens thought light was a wave. Using a cardboard box to recreate Thomas Young’s double slit experiment the wave properties of light...

This Catalyst article questions how heavy rocks can slide across a dry lake bed. The author introduces some theories to explain this phenomenon. 

This article is from Catalyst: Secondary Science Review 2016, Volume 27, Issue 1.

Catalyst is...

A statistical graphic from the Gatsby Foundation which demonstrates the chronic shortage of physics teachers across the UK and which looks at the various campaigns to address this shortfall over the past few years.

This video demonstrates the Coriolis effect. However, explains that much of what we see in terms of rotating water in either the northern or southern hemispheres is mostly due to other angular momentum sources in the body of the water.

An explanation of the Coriolis effect uses a scientific model (thought...

This video begins with the mnemonics Very furry lambs and Cute furry lambs.

Using a model of a railway carriage (its length, x and time taken to travel, t) the equation for velocity (v = ^x/_t) is derived.  Equating the length of the carriage to wavelength, λ and time to the period, T the...

This Catalyst article looks at X-ray free electron lasers that generate intense beams of X-rays and are used to reveal the structure of complex molecules.

This article is from Catalyst: Secondary Science Review 2016, Volume 27, Issue 2.

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This experiment allows you to investigate the boiling point of brine and the melting point of lead using a potentiometer arrangement. An alternative approach using digital voltmeters is also included at the bottom of the sheet.

In this Catalyst article, Mike Follows describes the surprising range of thermometers available to scientists today.

Many physical properties of materials depend on temperature. Thermometers are vital for measuring body temperature. The body's biochemical reactions work best at 37°C and the body is in...

This Catalyst article looks at thorium - a heavy element, similar to uranium. Some people think that it could be the nuclear fuel of the future, as it can be used as the fuel in a fission reactor - and it appears to be much safer than uranium.

This article is from Catalyst: Secondary Science Review 2014,...

This video explains how our preconceived ideas of how objects move can distort our understanding of Newton’s laws of motion, creating misconceptions.

1.            An object with no unbalanced force acting on it will naturally come to rest.

2.            An unbalanced force causes an object to move...