Curated Video
Nuclear Fission: The Power and Dangers of Splitting Atoms
Find out what happens when an atom splits and why, depending on how this process is controlled, the consequences can be productive or destructive. Physics - Energy And Radioactivity - Learning Points. Nuclear fission creates energy by...
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How to Make Fake Snow
Snow forms in the atmosphere as a result of water molecules attaching themselves to nuclei bacteria. But scientists have found ways to manipulate the freezing process of water and the production of these nuclei to create snow...
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Cloud Seeding
Scientists have found a way to make it rain. But weather modification has its critics, and there may be unforeseen consequences surrounding the "cloud seeding" process. Earth Science - Weather - Learning Points. When silver iodide is...
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We Are All Made of Stars
Discover how elements are formed in the centre of stars, and how some elements are formed in even more spectacular conditions. Chemistry - Periodic Table - Learning Points. Most elements were created in space. At the beginning of the...
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Place Like Home: Life On a Moon
The discovery of Titan's atmosphere excited scientists, who believe it could hold the key to life on Earth. Physics - UniverseLearning Points. Titan is the only moon in the Solar System with a dense atmosphere. Titan's atmosphere is 98%...
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Osmosis and Volume
We look at the effects of osmosis on the volume of potato and the appearance of red onion cells. Two cylinders of potato are measured and weighed before one is placed in salt water and the other in fresh water. We can see how osmosis...
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What is Globalisation?
How changes in communications and transport technologies have changed lives around the world. Discover what defines globalisation and the impacts. Human Geography - A Changing World - Learning Points. Globalisation is the process whereby...
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Extraction of Aluminium
Explore the difficulties of extracting aluminium from its ore, and how the vast quantities of heat and electricity generated by electrolysis allow this to happen. Chemistry - ReactionsLearning Points. Aluminium is difficult to extract...
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Glaciers - Moving Ice Masses
Glaciers are a destructive force, moving slowly across landscapes, reshaping them as they go. Earth Science - Geology - Learning Points. Over three-quarters of Earth's fresh water is locked in frozen reservoirs, known as glaciers....
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Fossil Fuels: Formation
Where does our natural gas, coal and oil actually come from? Discover the processes that created our modern fossil-fuel reserves, which began millions of years ago. Earth Science - Earth's Resources - Learning Points. Fossil fuels are...
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Energy Transformation
Discover how energy from the Sun is converted into different forms, and what happens to energy that is 'lost' from a system. Physics - Energy And Radioactivity - Learning Points. The Sun provides almost all the energy on Earth. Energy...
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Stimulated emission
As distinct from spontaneous emission, stimulated emission is the process in which a photon is emitted from an atom or molecule when hit by another photon of the right energy. A Twig Science Glossary Film. Key scientific terms defined in...
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Buffer
A substance that maintains a solution in a narrow range of pH. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce...
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Enzyme
A biological catalyst. Enzymes are specialised proteins that speed up biochemical reactions. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...
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Calibrate
A process of comparing sets of measurements with reliable reference measurements, in order to check the accuracy of an instrument, or adjust for a change in a measurement system. A Twig Science Glossary Film. Key scientific terms defined...
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Extrusion
The process of magma coming to the surface, either in steady flows or violent eruptions, and cooling to form rocks. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Recombination
The process of moving a section of DNA from one DNA molecule to another. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...
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Propulsion
The process of pushing or moving an object forwards. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce abstract...
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Polymer
A large molecule consisting of many recurring units, or monomers, generally linked in long chains that may contain thousands of links. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images...
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Combustion
Or burning, a chemical reaction that requires an initial source of heat, a fuel, and an oxidising agent such as oxygen, and releases energy as heat, and often light. A Twig Science Glossary Film. Key scientific terms defined in just 60...
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Antimatter
Matter composed of antiparticles. For every particle of ordinary matter there is a corresponding antiparticle which has the same mass but the opposite charge. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds...
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How far did your pineapple travel?
Follow the journey of a pineapple as it travels from Ghana, where it is grown, to the shelves of your local supermarket. People and places - Human geography - International trade Learning Points A consumer is the person who buys a...
Curated Video
Water cycle
Learn all about the Earth's water cycle. Physical processes -The Earth and beyond - Water and weather Learning Points Water constantly recycles itself through a process called the water cycle. Evaporation: the change of liquid water into...
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Living things
Some robots can be very lifelike but what makes something alive? Life processes - Living processes - Living things Learning Points All living things need nutrition and energy. All living things react to their environment, excrete waste...