Relating to the senses or to sensation.
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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...

A unit for measuring frequency, equal to one thousand hertz or cycles per second.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

Sound at frequencies below 20 Hertz, the lower limit of normal human hearing.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....

Travelling faster than the speed of sound in a given medium.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science...

A device that converts one form of energy into another.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary...

In living organisms, receptors are proteins, often found on the surface of a cell, which can bind to a specific signalling molecule or external stimulus, triggering a response.
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A Twig Science
Glossary Film.
Key...

The change in direction of a waveform at the boundary between two different media, so the wave returns to the medium in which it started.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60...

Discover what is happening when you crack your knuckles. And for starters, your knuckles don't crack, they pop.



Biology - Human Body - Learni

ng Points.

Your knuckles do n

ot crack - they pop!

The...

The proportion of energy supplied to a device or process that is converted into a useful form.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise...

When a musical note is played, we hear the note intended - the fundamental - but also other tones called harmonics that are whole number multiples of the fundamental.
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A Twig Science
Glossary Film.
Key scientific...

A technique used by some animals to locate the position of objects around them, by producing sounds and listening to their echoes.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds...

The interval between one sound and another that has double the frequency.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...

Different instruments can produce a wide variety of different sounds and notes, but why is this? Revealing how scientific principles combine to make music. Physics - Waves - Learning Points. Musical instruments are designed based on the...

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...

Microwaves are not only used to heat food. Mobile phones utilise this type of electromagnetic radiation, allowing us to communicate over large distances. Physics - Waves - Learning Points. Mobile phones work by converting the sound into...

See what's happening during different stages of pregnancy, as the baby changes from conception to birth. Biology - Being Human - Learning Points. A Twig FactPack Film. Open a discussion on what has been already learnt in a topic, or use...