A fundamental property of matter that means all particles are either positive, negative, or neutral.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and...

An electric current in which the flow of electric charge periodically changes direction.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

A safety device that breaks a circuit when the current exceeds a safe limit.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....

Everything our brain does, from controlling movement to conscious thought, is achieved by the firing of electrical signals called neurons. Biology - Being Human - Learning Points. Everything our brain does is achieved by electrical...

Whether it's a faulty appliance or a bolt of lightning, an electric shock can be fatal. How can we avoid electric shocks? Physics - Electricity And Circuits - Learning Points. If humans become part of an electric circuit they will...

The generation of a voltage in a conductor when placed within a changing magnetic field.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

Metals can be strong and hard, or they can be flexible. It's the special behaviour of ions that give metals their different properties. Chemistry - Atoms And Bonding - Learning Points. Metal atoms bond together and create giant lattice...

What is electricity? How is it created, and what makes it useful? Physics - Electricity And Circuits - Learning Points. Electricity is a flow of charge. The flow of moving electrons is known as the electric current. Voltage is the amount...

A build up of static electricity is usually harmless, resulting in only small shocks. But in some cases it can be deadly. Discover the danger static electricity poses for helicopters and their crew. Physics - Electricity And Circuits -...

Water is added to dry and bent matchsticks to let us see capillary action at work. The wood absorbs the water causing the matchsticks to straighten. Biology - Plants - Learning Points. Water is a polar molecule because the electrons are...

We investigate the effect that unbalanced charge has on polar molecules. We rub a balloon against hair to build up a negative charge and then hold this near a stream of water and then a stream of treacle. They both bend towards the...

We use a Van de Graaff generator to investigate static electricity. The generator is turned on and we see a spark move between the two domes. We then place a wig on the main dome and see the hair rise as the charge builds and the hairs...

From our bodies to the oceans and stars, everything is made of millions upon millions of tiny atoms. But what are atoms made of? Chemistry - Atoms And Bonding - Learning Points. The building blocks of all elements are called atoms. Atoms...

Introducing the four main forces of nature: gravity, electromagnetic force, weak and strong nuclear forces. Learn why they are fundamental to life on Earth. Physics - Forces - Learning Points. There are four fundamental forces of nature....

Discover how simple magnets and wires can be used to create electricity - and how this principle is now used in national power supplies. Physics - Electricity And Circuits - Learning Points. In 1835 the scientist Michael Faraday made an...

Electrical polarity is the arrangement of positive and negative charge in an electrical circuit, or distribution of positive and negative charge in, for example, a chemical bond. A Twig Science Glossary Film. Key scientific terms defined...

Discover that lightning is a form of static energy.
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Physical processes -Electricity and magnetism - Conductors and dangers
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Learning Points
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is a type of static...

Ever wondered how the motion of a conductor in a magnetic field generates voltage? We break it down with a real-world example of an airplane wing cruising through Earth's magnetic field. Don't worry; we keep it light and fun! Learn about...

In this episode, the team explores the fascinating interplay between moving electric charges and magnetic fields, unveiling the reciprocal relationship where moving magnetic poles generate electric fields. Delving into electromagnetic...

Dive into the life of Anthony Sullivan, the iconic pitchman behind OxiClean and more, as he transforms skepticism into sales magic.<br/>

The inductive effect refers to the electron-donating or withdrawing influence that substituents exert on a molecule through sigma bonds. Electronegative atoms or groups pull electron density away from the rest of the molecule, while...

By the end of this learning object, the student will be able to: Know the components of an electric circuit and how it works.13761

This video examines Paul Revere’s contributions during and after the Revolutionary War. From his efforts in printing money and supplying ammunition to his post-war ventures in hardware, bell-making, and copper production, Revere played...

By the end of this learning object, the student will be able to: Recognize the three types of nuclear radiation.