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Volt (V)
The SI unit of electric potential or electromotive force. 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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Metamorphism
The transformation of rocks beneath the Earth's surface through heat and pressure, and the presence of dissolved minerals in hot groundwater. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning...
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Pressure
Pressure is defined as force per unit area, measured in newtons per square metre, or pascals. 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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Volume
The amount of space a substance occupies. 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 concepts and...
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Volatile
A substance which turns easily to a vapour at normal temperatures and pressures. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary...
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Rate of reaction
A measure of how fast a reaction is taking place. 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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Fossil fuels
Fuel formed over millions of years, in conditions of high heat and pressure, from the fossilised remains of dead organic matter such as plants and animals. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds...
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Equilibrium
A reversible chemical reaction reaches equilibrium when the concentrations of the reactants and products are constant. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise...
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Enthalpy change
The amount of heat energy gained or lost by a chemical system when a process or reaction takes place at constant pressure. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise...
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Crude oil
A naturally occurring thick brown liquid, composed of a mix of hydrocarbons, and usually found deep underground. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Long-period events
Earthquakes with relatively low-frequency vibration, caused by sudden changes of pressure inside volcanoes and magma channels. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...
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What is an Earthquake?
The earth below our feet is continually moving. How do changes underground lead to effects on the surface, and what happens to change these movements into devastating earthquakes? Earth Science - Geology - Learning Points. Movement of...
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Gas Laws
The air we breathe is made up of a mixture of gases. Discover the invisible forces of gas at work around us. Physics - Forces - Learning Points. The air we breathe is made up of gases including nitrogen, oxygen and carbon dioxide. The...
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Pressure and Surface Area
Learn how surface area can affect the amount of pressure exerted, and why this is useful in life? Physics - Forces - Learning Points. Pressure is the amount of force acting on a set area. Pressure is measured in pascals. Pressure can be...
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Earthly Treasures: Precious Gemstones
Discover the specific conditions needed for the formation of emeralds, rubies and sapphires; and how there is now potential to 'grow' them in laboratories. Earth Science - Geology - Learning Points. Emeralds are made from beryllium....
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Red Hot: Emergency Stop
Revealed: the tremendous heat created and energy 'lost' when cars brake. Physics - Energy And Radioactivity - Learning Points. Car brakes convert kinetic energy into heat energy. When you press the car brake pad a system of levers and...
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Factpack: Pressure and Altitude
Changes in pressure at different heights, from outer space to the depths of the ocean. Physics - Forces - Learning Points. A Twig FactPack Film. Open a discussion on what has been already learnt in a topic, or use to grab attention at...
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Earthly Treasures: Diamonds
Formed deep within the Earth's mantle, diamonds are difficult to find. But it's not just their rarity that makes them so valuable - diamonds have some surprising industrial applications too. Earth Science - Geology - Learning Points....
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Steam Power
Steam power lay at the heart of the Industrial Revolution. Discover steam power's historic legacy, how it works, and how much it is still used today. Physics - Energy And Radioactivity - Learning Points. The steam engine is one of the...
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Blood Transfusion: Vietnam
Lessons from the frontline: why the experiences of soldiers in the Vietnam War made doctors rethink how they treat severe trauma wounds. Biology - Human Body - Learning Points. During the Vietnam War, emergency blood transfusions given...
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Hydropower
How dams, tidal power and wave power work to generate electricity. What are the pros and cons? Earth Science - Earth's Resources - Learning Points. Hydropower uses the power of moving water as a source of energy. Dams, tidal power and...
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How Hot Is the Earth's Core?
Unreachable by man, scientists have developed a complex experiment to demonstrate the heat and pressure at the centre of the Earth. Earth Science - Geology - Learning Points. The Earth's core is a dense ball of iron and nickel. To...
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Rock Types - Geological Formations
An explanation of the geological processes which lead to the formation of different types of rock. Earth Science - Geology - Learning Points. There are three types of rock: sedimentary, igneous and metamorphic. Sedimentary rock forms...
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Making a Star on Earth
Large-scale nuclear fusion is one of the ultimate goals of science which has yet to be achieved. How does nuclear fusion work and is a future likely in which we can reproduce the power of a star on Earth? Earth Science - Earth's...