Howcast - Learn how to pick a road bike from racer Alexander Barouh in this Howcast road cycling video.

Howcast - Learn all about speaker stands from audio expert Jon Zimmer in this Howcast video.

A video entitled “How Do Humans Hear Sound” which describes the parts of the human ear and how those parts send signals to the brain.

This video explains how sound waves travel through the air, solids, and liquids to reach our ears. It explores how vibrations create sound waves, which are collected by our ears and make our eardrums vibrate. Our brain recognizes these...

NASA's InSight has run into a few difficulties since it landed. Can scientists overcome them?

The tensor tympani muscle is a tiny muscle in the middle ear that helps dampens external sounds falling on the ear. The tensor tympani muscle originates from the Eustachian tube, which is also known as the auditory tube. From there, this...

Space is full of radio waves, plasma waves, magnetic waves, gravitational waves, and shock waves, all of which can travel in space without a medium. These waves are recorded by instruments that can sense these waves, and the data is...

A mechanical wave is one that is carried by vibrations in a physical medium, and which therefore requires a medium in which to propagate.
<

br/>

A Twig Science
Glossary Film.
Key scientific terms defined in just 60...

Polarisation is the process by which a transverse wave, such as a light wave is made to oscillate in one plane only.
<

br/>

A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning...

The rate at which a repeating event occurs, usually measured in counts per unit time.
<

br/>

A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

A waveform in which the vibrations of the medium it is propagated through are in the same direction as the wave's travel.
<

br/>

A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using...

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...

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...

Learn how scientists can predict volcanic activity using seismology to monitor lava patterns deep underground. Earth Science - Geology - Learning Points. Scientists use seismology to predict an eruption. A "long-period event" involves...

How our ears hear different frequencies, and how they work with the brain to turn these into sounds which we understand. Biology - Being Human - Learning Points. Sounds are simply movements of air molecules. Our ears are extremely...

Conduction, convection and radiation are all ways in which heat is transported. How does each work, and what are they useful for? Physics - Energy And Radioactivity - Learning Points. The three types of heat transport are conduction,...

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...

We create a polymer using cornflour and water called oobleck. Oobleck is a non-Newtonian liquid that behaves like a solid and a liquid. When placed on a speaker, the vibrations cause the polymer to constantly change its behaviour and it...

We make sense of the world around us through touch, smell, sight, taste and sound. But what are these senses and how does the body and brain process them? Biology - Being Human - Learning Points. Our senses detect information from our...

Sounds are made by tiny movements called vibrations.
<

br/>

The world around us - Light and soun
d

- Vibrations />

Learning Points
Some sounds
a

re loud and some sounds are quiet.





...

Sounds travel in waves.
<

br/>

The world around us - Light and


sound - Sound />

Learning Points
Sounds are made by


tiny movements called vibration
s

.


Sound energy travels in...

Find out how musicians tune their instruments.
<

br/>

Physical processes - Sound -
C

hanging pitch />

Learning Points
Pitch depends on the frequency of sound waves


– the number of waves per...

Dive into alligator-infested water to understand how vibrations enable these reptiles to communicate.
<

br/>

Physical processes -Sound -
W

hat is sound? />

Learning Points
Sound is cau
s

ed by the...

Did you know that the Sun produces vibrations?
<

br/>

Physical processes - Light - The Sun as
a

light source />

Learning Points



The Sun produces vibrations.


A Twig Tidbit Film - Did...