The discovery and uses of reactive metals throughout history, and how their uses have defined the period in which they were discovered. Chemistry - Periodic Table - Learning Points. The reactivity series ranks the chemical reactivity of...

Transition metals are the largest group in the periodic table. Find out what similarities they share, and how we make use of these metals. Chemistry - Periodic Table - Learning Points. Transition metals are found as a block in the middle...

Material that conducts heat or electricity very poorly, and so can be used to provide some measure of protection. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...

We use electrolysis to break water molecules down into hydrogen and oxygen. This is done using the Hoffman apparatus. Water is added to the apparatus along with some dilute sulfuric acid. When a current is passed through the water,...

We use lemons and strips of zinc and copper to make a battery. First, strips of copper and zinc are added to one lemon and they are connected across a voltmeter. This is repeated, this time with more lemons and metal plates, until a...

Explore the difficulties of extracting aluminium from its ore, and how the vast quantities of heat and electricity generated by electrolysis allow this to happen. Chemistry - ReactionsLearning Points. Aluminium is difficult to extract...

Fossil fuels are a finite energy source. How long will they last, and why is it so difficult and costly to extract these fuels from beneath the earth and oceans? Earth Science - Earth's Resources - Learning Points. Fossil fuels are...

The heat at the centre of our planet could fulfil all of our energy needs. Find out how some are already utilising geothermal power. Earth Science - Earth's Resources - Learning Points. Geothermal power is obtained from heat within the...

Electric eels can generate amazing amounts of electricity inside their body. Discover how they use this for defence and to stun potential prey. Physics - Electricity And Circuits - Learning Points. Electric eels create electricity to...

What are the properties of magnets, and why are they useful to us? Physics - Electricity And Circuits - Learning Points. A permanent magnet is a piece of metal that possesses a magnetic field. The magnetic field is strongest at the...

Despite being a clean, renewable source of energy, wind farms attract dissent. Discover the downside to the construction of wind farms and why some people are upset about their use. Earth Science - Earth's Resources - Learning Points....

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...

In a metal, each metal atom readily gives up its outer shell electrons, resulting in a sea of free electrons flowing throughout a lattice of positively charged metal ions. A Twig Science Glossary Film. Key scientific terms defined in...

In between two extremes, neither one thing nor another. 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...

Wind turbines generate electricity. The world around us - Inventions - Electricity Learning Points Wind turbines generate electricity. Electricity can come from many different sources, including wind turbines. A Twig Junior Film - Core...

Electricity is a type of energy that makes things work. The world around us - Inventions - Electricity Learning Points Electricity is a type of energy that makes things work. We use electricity to power things in our homes. A Twig Junior...

What is it? ... These are electricity pylons! Physical processes - Electricity and magnetism - Electricity A Twig Tidbit Film - Jigsaw. An image is slowly revealed as pieces of the jigsaw are removed. The children have to identify it.

What is it? ... It's a battery! Physical processes - Electricity and magnetism - Electrical circuits 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.

What is it? ... It's a computer chip! Physical processes - Electricity and magnetism - Series and parallel circuits A Twig Tidbit Film - Pixelate. A pixelated image unscrambles. The children have to guess what it is.

Did you know that solar power can be used to fly a plane? People and places - Future of energy - The future of energy Learning Points Solar power from photovoltaic panels can be used to fly planes. A Twig Tidbit Film - Did you know? A...

Discover how lightning rods protect buildings when they are struck and why they are made of metal. Material processes - Classifying materials - Choosing suitable materials A Twig Tidbit Film - Clip. A short film that extends the learning...

True or false ... Water can conduct electricity? Physical processes -Electricity and magnetism - Conductors and dangers of electricity Learning Points Water is a non-metal that can conduct electricity. A Twig Tidbit Film - True or False?...

Did you know that electricity is used to save lives? Physical processes - Electricity and magnetism - Conductors and dangers of electricity Learning Points Defibrillators use electricity to restart a heart. A Twig Tidbit Film - Did you...

Discover who makes sure the electricity stays switched on in our homes. Physical processes - Electricity and magnetism - Electricity Learning Points Electricity only flows when a circuit is complete. A Twig Tidbit Film - Clip. A short...