The Future of Energy
In this Cambridge University film, three academics look at wind power, carbon capture and storage (CCS) and material efficiency as examples of how we can cut our carbon dioxide emissions. Demand for energy is sky-rocketing and producing enough energy to meet this demand has significant environmental impacts and could cause catastrophic…
This Icy World
Cambridge University glaciologist Professor Julian Dowdeswell has spent three years of his life in the Polar Regions. As Director of the Scott Polar Research Institute at the University of Cambridge, this film follows him to Greenland and the Antarctic as his research reveals the challenges we all face from climate change. He…
The Emotional Computer
Can computers understand emotions? Can computers express emotions? Can they feel emotions? This video, from the University of Cambridge, examines the research of Professor Peter Robinson exploring how emotions can be used to improve interaction between humans and computers. The research team is collaborating closely with Professor…
Seahorses and the Onion World
This video, from Cambridge University, features Dr Amanda Vincent - one of the world's leading experts on seahorses and their relatives – as she spends a year at Cambridge University’s Department of Geography on a sabbatical from the University of British Columbia. Dr Vincent explains the scope of her research and…
Professor Risk
David Spiegelhalter's actual title is Professor of the Public Understanding of Risk at the University of Cambridge. In this Cambridge Ideas video he discusses the relative risks of eating a bacon sandwich or eating a bowl of porridge for breakfast, compares the risks associated with different types of transport and considers…
Meet the Algae
In this film, scientists at Cambridge University take a closer look at algae and examine its potential as a renewable source of energy. In the near future algae could be used as a sustainable, carbon neutral biofuel. Alison Smith, Professor of plant biochemistry, explains that algae make a large contribution to global carbon dioxide…
Just Add Water
Rotifers are microscopic animals that survive against all the odds. This film follows Dr Alan Tunnacliffe, award-winning Cambridge researcher at the Institute of Biotechnology, as he tests their super-powers by draining 90% of the water in their microscopic bodies, heats them to boiling point and freezes them in liquid nitrogen. He…
How Many Light Bulbs Does it Take to Change a Man?
This video features Cambridge University physicist, David Mackay, in a passionate, personal analysis of the energy crisis in the UK, in which he comes to some surprising conclusions about the way forward. The film is based on his new book Sustainable Energy Without the Hot Air, in which Professor Mackay has calculated the numbers…
Sticky Feet
This video features Chris Clemente, from Cambridge University, who is studying the mechanisms that ants and other insects (especially cockroaches) use to walk down as well as up walls. Ants have incredibly sticky feet. With them they can hang onto ceilings, whilst carrying 100 times their body weight. But if they are stuck…
Tunnelworks: Introductory Video
Tunnelworks is a series of teaching and learning resources linking mathematics and science to the Thames Tideway Tunnel project, a major new sewer that will help protect the River Thames from increasing pollution. Background to the project is given in this introductory video which explains when and how the sewer system, which still…
How Does Nature Sense?
Adelheid Fischer, Biomimicry Fellow and Coordinator of InnovationSpace at Arizona State University, explains how she finds inspiration in the star-nosed mole. The mole does not use its unusual nose for smell, but as a touch sensing organ. The mole can also smell under water by sending out bubbles to catch odour molecules, and then…
How Does Nature Cool?
In this video from The Biomimicry 3.8 Institute, Sherry Ritter describes how the red kangaroo stays cool in temperatures of up to 45°C. The kangaroo licks its wrists, where there are a large number of blood vessels close to the surface, and this cools through evaporation. Sherry asks whether we could learn from this cooling technique…
How Does Nature Convert Energy?
In this video Janine Benyus, co-founder of The Biomimicry 3.8 Institute, describes a surprising adaptation of the pistol shrimp. The pistol shrimp has a very large claw and uses this to fire a bubble and stun its prey. The shrimp can close its claw so quickly that a vacuum is created behind the bubble. The vacuum collapses and for…
4/5- Publication year: 2010 to date
- Video
Translations
Translate parallel to the y axis – looks at what happens to the graph of y=f(x) when it is transformed to give the graph of y=f(x)±a. Starting with the graph of y = x2, different values of a are added or subtracted to the graph. The explanation continues to show that the graph is translated parallel to the y axis…
Stretches
Stretch parallel to the y axis – looks at what happens to the graph of y=f(x) when it is transformed to give the graph of y=af(x). Starting with the graph of y = x2, different values of a are used to show that the graph is stretched from the x axis parallel to the y axis. The next example shows that the translation works with…
Highest Common Factors and Lowest Common Multiples
Highest common factor and lowest common multiple – The first example finds the highest common factor of 6 and 15 by listing all the factors of each number, highlighting all the common factors and indicating the highest common factor. A similar technique is used to find the lowest common multiple of 6 and 15. Highest common…
Factors, Multiples and Primes
Factors – Beginning with the definition of what a factor is this video proceeds to find the factors of 12 with the aid of a factor bug. The factor bug is a visually stimulating method of finding factors and suitable for use with younger students. After finding the factors of 18, the factors of 17 are found. The fact that 17…
Maths and Art
Curves of pursuit – This video demonstrates how to construct curves of pursuit. Beginning by drawing a square, students are taken through the required steps. The video ends by suggesting different shapes as starting points. Sequence designs – Beginning with the sequence of square numbers, a new sequence is generated…
Introduction to Graph Transformations
Introduction to graph transformations – The video begins by suggesting that all graphs in a family are related in some way. There follows a useful explanation of function notation linking the notation to the inputs and outputs of a function machine. The four graph transformations; translate parallel to the y axis, translate…
Fractions: Mixed Numbers
Converting between mixed numbers and improper fractions – The explanation begins by showing the difference between a proper fraction, an improper fraction and a mixed number. Pictorial representations of the fractions are used to aid understanding of how a mixed number and an improper fraction represent the same value. The…
Fractions: Adding and Subtracting
Adding and subtracting fractions with the same denominator – This video begins by showing the common mistake of adding the numerator and adding the denominator and explaining why this cannot be correct. The correct method is used with a pictorial representation to aid understanding. The video continues with a series of simple…
Fractions: The Basics
What are fractions? The basics – This video covers the basics of fractions beginning with the definition of the numerator and the denominator. Simple examples are given to illustrate that fractions are a way of describing proportion. There follows an explanation of how a fraction also represents a division calculation. Equivalent…
Colour Mixing
This video from the Royal Institution describes how colour mixing works. Colours of light cannot be mixed in physics but different cones in your eyes are sensitive to different colours. The brain interprets a mixture between the two as a colour somewhere between the two. In the case of magenta, your brain invents this colour…
Cloud Chamber
This video from the Royal Institution shows tracks within a cloud chamber. A supersaturated layer of alcohol vapour exists just above the floor of the chamber and the ionisation radiation causes vapour to condense along the path of the radiation. An Americium source is introduced into the chamber so that tracks from alpha radiation…
Tales from the Prep Room: Liquid Oxygen
This video, from the Royal Institution, shows how liquid oxygen is made using an oxygen gas cylinder and liquid nitrogen to condense it to a liquid. Pouring liquid oxygen between the poles of a magnet demonstrates how the unpaired electrons within the material have a residual dipole and can act as a weak magnet. This called paramagnetism.…
Tales From the Prep Room: Alkali Metals
This video from the Royal Institution shows how a small piece of sodium on the end of a match head will burn if a few drops of water are added to the sodium. All alkali metals are very reactive in air and with water. Potassium is more reactive than sodium, and the video shows how only one drop of water can make the potassium burn…
Lithium
In the build-up to the Christmas Lectures in 2012, the Royal Institution published a new video for every day of advent revealing the elements that really excite and inspire people. In this short film, physicist Jim Al-Khalili focuses his attention on the very strange nucleus from an isotope of lithium that only exists due to the…
Potassium
In the build-up to the Christmas Lectures in 2012, the Royal Institution published a new video for every day of advent revealing the elements that really excite and inspire people. Internet technologist Ben Hammersley explores the powerful properties of the "really awesome" element, potassium. This soft metal is kept…
Oxygen
In the build-up to the Christmas Lectures in 2012, the Royal Institution published a new video for every day of advent revealing the elements that really excite and inspire people. Dame Jane Goodall expresses her love of oxygen and its vital role in sustaining all animal and human life. Having studied chimpanzees in the rainforests…
Copper
In the build-up to the Christmas Lectures in 2012, the Royal Institution published a new video for every day of advent revealing the elements that really excite and inspire people. Jerry Hall demonstrates the beauty and versatility of her favourite element, copper. Copper turns green when exposed to the atmosphere on buildings,…
Nitrogen
In the build-up to the Christmas Lectures in 2012, the Royal Institution published a new video for every day of advent revealing the elements that really excite and inspire people. In this short film, children's presenters Richard McCourt and Dominic Wood (Dick and Dom) explain why they are big fans of nitrogen. Not only…
Hydrogen and Oxygen
In the build-up to the Christmas Lectures in 2012, the Royal Institution published a new video for every day of advent revealing the elements that really excite and inspire people. Demo developer and science presenter Fran Scott has two favourite elements: hydrogen and oxygen. She demonstrates the explosive nature of hydrogen…
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