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Sonic Boom - Sound Barrier Burst
The loud bang caused by a plane or other object flying faster than the speed of sound. 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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Delta
A geographical feature formed where a river reaches the sea or other large body of water into which it empties. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Supersonic
Travelling faster than the speed of sound in a given medium. 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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Centre of Gravity: Weight Balance Point
The point from which the whole weight of an object appears to act. 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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Velocity
The speed of an object in a particular 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 abstract...
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Refractive index
A measure of the speed of light in a medium, defined as the ratio of the speed of light in a vacuum, to its speed in the medium under consideration. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using...
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What is a Light Year?
When we look at distant stars, we are looking back in time. What is a light year, how is it measured and why do we measure distance in terms of time? Physics - Universe - Learning Points. Light travels through space at 300 million metres...
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Doppler Shift: Frequency and Motion
A change in the observed frequency of a wave when it is emitted from a moving object and observed from a stationary point, or vice versa. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images...
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Factpack: Redshift
Discover how different wavelengths allow scientists to measure the distance to the stars. Physics - Universe - Learning Points. A Twig FactPack Film. Open a discussion on what has been already learnt in a topic, or use to grab attention...
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Acceleration
The rate of change of velocity with time, measured in metres per second squared. 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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Refraction
The change in direction of a wave caused by its change in velocity, as it moves from one medium into another. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Fibre Optics
Light can be transported over huge distances via fibre optic cables, losing virtually no information. How is this possible? Physics - Waves - Learning Points. Fibre-optic cables carry information from our phones and computers as light. A...
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Resonance: How Sound Changes Across Different Mediums
Sounds can change as they move from one medium to another. Under the right circumstances the effect is surprising and extreme. Physics - Waves - Learning Points. Sound is a wave that is created by vibrating objects. Every object has a...
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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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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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Aerodynamics in Cycling
The cutting edge bike and clothing designs that make cyclists more aerodynamic and can make the difference between winning and losing. Physics - Forces - Learning Points. A professional cyclist's main aim is to reduce air resistance. New...
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The Energy of Formula 1
Learn how Formula 1 engineers have managed to recapture 'lost' energy to power their cars and win races. Physics - Energy And Radioactivity - Learning Points. Car brakes lose a massive amount of energy as heat. Acceleration and...
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The Chase
Will the lion catch the zebra? Find the time it has to escape by solving the animals' equations simultaneously. Maths - Algebra A Twig Curriculum Film. Delivering key learning points. Get straight to the facts in just three minutes –...
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What is GPS? - Satellite Navigation
GPS satellites pin-point locations on Earth. How has this technology enhanced our lives, from military systems to social applications? Physics - Universe - Learning Points. GPS stands for Global Positioning System. GPS uses 24 satellites...
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Factpack: Beaufort Scale
How to rate the wind according to Beaufort's scale, from a gentle breeze to a hurricane-force gale. Earth Science - Weather - Learning Points. A Twig FactPack Film. Open a discussion on what has been already learnt in a topic, or use to...
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Day and Night - Earth’s Rotation
What is the difference between day and night? How is this governed by the Earth's movement? Physics - Our Solar System - Learning Points. The Sun generates light. The Earth spins on its axis. A full rotation of Earth takes 24 hours. The...
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Moon Measuring
The ingenious system to measure the distance to the Moon involving Apollo astronauts, lasers and a unique mirror system planted on the lunar surface. Physics - Our Solar System - Learning Points. In 1969, the Apollo 11 astronauts left an...
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Fly Me to the Moon
What do you need to do to get into space? An explanation of orbits, forces and the 'slingshot effect'. Physics - Our Solar System - Learning Points. In order to land on the Moon, Apollo 11 had to be launched at just the right speed. If a...