Curated Video
Forms of Energy
Energy comes in many forms. What are they, how do they differ and what can they be used for? Physics - Energy And Radioactivity - Learning Points. Energy is converted or transferred, but never lost. Energy is measured in joules (j)....
Curated Video
Hi-Fi Engineering
A demonstration of how hi-fi speakers use a clever combination of electronics and magnetism to convert electrical impulses into sound waves, which our brain then interprets as music. Physics - Electricity And Circuits - Learning Points....
Curated Video
Animal Senses
Animals share many of our senses, but can use them in very different ways. Snakes, bats and cheetahs have senses optimised for hunting and migrating in different environments. Biology - Being Human - Learning Points. Different sensory...
Curated Video
Speed of Sound
Sound waves move through different mediums at different speeds, but why is this? What factors affect the speed of sound? Physics - Waves - Learning Points. Speed of sound depends on many different factors. Temperature, elasticity and...
Curated Video
What is Sound?
Sounds can vary greatly: extremely quiet or deafeningly loud, high and shrill to low and booming. Why are they so different? Physics - Waves - Learning Points. Sound is a vibration passed to and fro along particles forming a wave. It can...
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Doppler Shift: Sound Discovery
How a unique but simple experiment in the 19th century gave a new insight into the behaviour of sound waves. Physics - Waves - Learning Points. The Doppler Effect is when the pitch of a sound seems to change as it moves past. The...
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Shockwaves: The Damage Caused by Supersonic Speeds
Discover the damage caused by shockwaves and how they are created by supersonic speeds. Physics - Waves - Learning Points. Waves of high pressure are produced when something moves through a medium at supersonic speed. At supersonic...
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Rubens' Tube
We create a Rubens\u2019 Tube to demonstrate the movement of sound waves. A tube lined with holes is filled with propane and connected to a speaker. We light the gas coming from the holes and play different frequencies and volumes of...
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Measuring Music
We use a sounding board called a sonometer to investigate how the pitch of sound changes when the length of wire being plucked changes. We change the position of a moveable bridge to change the length of the wire and discover that...
Curated Video
Bell in a Vacuum
We look at how a vacuum affects how sound travels. An alarm is set off and placed under a bell jar. The air is removed from the jar to create a vacuum. We can still see the hammer of the alarm clock moving, but cannot hear the sound....
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What is a Memory?
What are memories and how does the brain store them? How does our memory develop as we grow? Biology - Being Human - Learning Points. As the brain processes experiences and stimuli, it creates pathways between neurons. Pathways between...
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Fermentation: The Chemical Process Behind Everyday Foods
Discover the chemical process which produces some of our most common foodstuffs, from bread to yoghurt, to wine and vinegar. Chemistry - Chemical Industries - Learning Points. Fermentation is the process of converting sugar and other...
Curated Video
Medical Marvels: Ultrasound
Born out of research into RADAR in World War Two, ultrasound has become one of the most important medical inventions. What is it, and how does it work? Biology - Being Human - Learning Points. Ultrasound was developed by Ian Donald in...
Curated Video
What Do Sine Waves Sound Like?
Hear sine waves as sound, and discover the equations that describe them: and the effect of increasing or decreasing the variables of amplitude and frequency. Maths - Shape A Twig Math Film. Reinforce and extend the learning required by...
Curated Video
Lightning - Atmospheric Discharge
A high-current electrical discharge in the atmosphere that may occur during thunderstorms, or sometimes dust storms or volcanic eruptions. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning...
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Receiver
A device that combines a detector and some kind of signal processing electronics to convert an electromagnetic signal into an electrical signal, or into a comprehensible sound or visual form. A Twig Science Glossary Film. Key scientific...
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Ultrasound - High-Frequency Sound
Sound with a frequency above the normal range of human hearing, or 20,000 hertz. 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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The Heart - Heart Basics
Introduction to the heart. Your heart is inside your chest and it beats around 100 times a minute. Living things - My incredible body - My heart Learning Points Your heart is inside your chest and it beats around 100 times a minute. A...
Great Big Story
Behind the scenes at the Smithsonian Natural History Museum
Discover the hidden treasures of the Smithsonian Museum, where experts manage 144 million objects, aiding research on biodiversity, climate change, and more.
Curated Video
Dangers of sound – Jigsaw
What is it? ... These are ear protectors! Physical processes - Sound - Dangers of sound A Twig Tidbit Film - Jigsaw. An image is slowly revealed as pieces of the jigsaw are removed. The children have to identify it.
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How does sound travel? – Jigsaw
What is it? ... It's a bat! Physical processes - Sound - How does sound travel? A Twig Tidbit Film - Jigsaw. An image is slowly revealed as pieces of the jigsaw are removed. The children have to identify it.
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Changing pitch – Big reveal
What is it? ... It's a piano! Physical processes - Sound - Changing pitch A Twig Tidbit Film - Big Reveal. The image zooms out from an extreme close-up to full frame. The children have to guess what the image is.
Curated Video
How do we hear? – Big reveal
What is it? ... It's an ear! Physical processes - Sound - How do we hear? A Twig Tidbit Film - Big Reveal. The image zooms out from an extreme close-up to full frame. The children have to guess what the image is.
Curated Video
Vibrations - Sound Creation
Sounds are made by tiny movements called vibrations. The world around us - Light and sound - Vibrations Learning Points Some sounds are loud and some sounds are quiet. Without a vibration there is no sound. A Twig Junior Film - Core...