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Force
A 'push' or a 'pull' on an object. 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 key...
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Magnetic force
A force acting between magnets or moving electric charges. 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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Work
Mechanical work is the energy transferred by a force in moving through a distance. 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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Metallic bond
A metallic bond is the attractive force that exists between positively charged ions and the 'sea' of negative electrons in a metal element. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning...
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Gravity - Attractive Force of Mass
An attractive force that acts between all matter that has mass, and is proportional to mass. 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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Vector
A quantity that has both magnitude, or size, and direction. 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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Energy
The capacity of a system or a body to do work. 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...
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Centripetal Force: The Force Keeping an Object on a Circular Path
The inward-pointing force that keeps an object moving in a circular path. 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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Motor effect
The force experienced by a current-carrying wire when placed within a magnetic field. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science...
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Surface tension
The cohesive force that occurs at the surface of a liquid, due to the attractive forces between molecules. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Buoyancy: The Forces That Determine Why Objects Float or Sink
Discover the forces at work underwater, which dictate why large boats float but small pebbles sink. Physics - Forces - Learning Points. The buoyant force is an upward-acting force determined by the weight of the displaced water. Ships...
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Rollercoasters
Journey through a rollercoaster ride to find out which forces are at work to create this theme-park thrill. Physics - Forces - Learning Points. Rollercoasters do not have engines. Rollercoasters use forces. Electromagnets are used along...
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Levers, Wheels, Pulleys
There are only six basic types of machine. Discover more about levers, wheels and pulleys: what are they and why are they useful? Physics - Forces - Learning Points. Archimedes designed simple machines to move and lift objects. The...
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Coastal Processes: Waves
Coastal features around the world vary hugely. How do waves contribute to shaping coastlines? Earth Science - Geology - Learning Points. Waves are created by wind. Waves vary in size and strength. Waves break in shallow water....
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Centripetal Force: How Central Forces Cause Objects to Spin or Turn
What are central forces and how do they make objects spin or turn? Physics - Forces - Learning Points. A centripetal force makes an object follow a circular path. The moment of inertia is the resistance of an object when the speed of...
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Maglev Trains
Why using magnets, not wheels, allows this train to defy gravity and reach record speeds without an engine. Physics - Electricity And Circuits - Learning Points. The Maglev train in China does not have an engine. Instead it uses...
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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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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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Factpack: G-Force
Chart G-Force up the scale, from standing still to the greatest G-force ever. 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 the start...
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Factpack: Experience Friction
An interactive demonstration of how friction is created, and its effects. 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 the start of a...
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Plant Transport
How does a tall tree draw water from its roots to its leaves? And how does food made in leaves reach the rest of a plant? Discover how plants transport resources via the xylem and phloem. Biology - Plants - Learning Points. Transpiration...
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Place Like Home: Cassini
The enormous challenge of building a probe capable of travelling over 1 billion kilometres to reach Saturn's moon, Titan. Physics - Universe - Learning Points. Huygens probe was designed by the European Space Agency at a cost of £400...
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How Do Animals Fly?
Biological evolution has allowed some animals to fly. Find out exactly how their wings work to achieve this. Physics - Forces - Learning Points. Flight occurs when the upward force is greater than the downward. Flight is explained by...