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The Elements: Phosphorus
Phosphorus is a versatile element, found in our DNA as well as fireworks and fertilisers. Chemistry - Periodic Table - Learning Points. Phosphorus helps convert food into energy. Phosphorus is found in our DNA. Compounds of phosphorus...
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Isotopic mass
The mass of 1 atom of a specific isotope of an element. 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...
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The Elements: Mercury
Mercury is an elusive and toxic element. Chemistry - Periodic Table - Learning Points. Mercury is a rare element. Mercury is a liquid at room temperature. Mercury is highly toxic. Mercury is used in thermometers and batteries. A Twig...
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Displacement reaction
A reaction in which a more reactive element replaces a less reactive element in a compound. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science...
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Atomic weight
The average mass of atoms of an element. 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 concepts and key...
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Mineral (biology)
An inorganic chemical element necessary for human growth and health, such as iron, sodium, potassium, or magnesium. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Octave
The interval between one sound and another that has double the frequency. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...
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Phlogiston and Oxygen
How French Chemist Antoine Lavoisier revealed the true significance of oxygen and brought about the birth of modern chemistry. Chemistry - Periodic Table - Learning Points. Antoine Lavoisier experimented with weighing substances before...
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The Elements: Iron
Iron is crucial in many areas of life: it is found in our blood, as well as being used to build bridges. Chemistry - Periodic Table - Learning Points. Iron is one of the most common element on Earth. Iron is found in living organisms....
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The Elements: Chlorine
Find out why chlorine is used in swimming pools. Chemistry - Periodic Table - Learning Points. Chlorine is a yellow-green gas. At high concentrations, chlorine gas is poisonous. At lower concentrations, chlorine is used in cleaning...
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The Elements: Aluminium
Learn about the most abundant metal in Earth's crust. Chemistry - Periodic Table - Learning Points. Aluminium is the most abundant metal in the Earth's crust. Aluminium is highly reactive. Aluminium alloys are strong and lightweight,...
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Earthly Treasures: Precious Gemstones
Discover the specific conditions needed for the formation of emeralds, rubies and sapphires; and how there is now potential to 'grow' them in laboratories. Earth Science - Geology - Learning Points. Emeralds are made from beryllium....
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The Elements: Hydrogen
Hydrogen is a highly flammable element, with the potential to become a non-polluting alternative to gasoline. Chemistry - Periodic Table - Learning Points. Hydrogen is the element with the lowest density. Hydrogen is highly flammable and...
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The Elements: Uranium
Discover the vital role uranium plays in nuclear technology. Chemistry - Periodic Table - Learning Points. Uranium was discovered in 1789. Uranium was named after the planet Uranus. Uranium is weakly radioactive. Uranium is important in...
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The Elements: Gold
Find out why gold is a valuable metal element. Chemistry - Periodic Table - Learning Points. Gold is a rare element, found in very small quantities on Earth. Gold is the most malleable of all the metals and can be moulded, cast or bent...
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Factpack: Mercury in Food Chains
Discover how mercury travels through food chains, and how its concentration multiplies along the way. Biology - Ecosystems - Learning Points. A Twig FactPack Film. Open a discussion on what has been already learnt in a topic, or use to...
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The Elements: Neon
Learn about the noble gas, neon, and its uses. Chemistry - Periodic Table - Learning Points. Neon is a colourless gas. When electricity is passed through neon, it produces a bright orange-red light. Neon is a noble gas and is inert,...
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The Elements: Potassium
Potassium is one of the most unpredictable elements, a soft metal that is essential to life. Chemistry - Periodic Table - Learning Points. Potassium is a soft metal. In our bodies potassium compounds help keep us healthy. Potassium...
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Alloys
What exactly are alloys? What is it about their properties that make them so useful for a huge variety of purposes, from construction to jewellery? Chemistry - Periodic Table - Learning Points. Alloys are metals mixed with other...
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Carbon: Introduction
Carbon occurs naturally in four different forms. Discover how they differ and why? Chemistry - Atoms And Bonding - Learning Points. Carbon is present in all living organisms. Carbon in its elemental form appears as four distinct...
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Introduction to the Periodic Table
In 1869, Russian scientist Dmitri Mendeleev created the Periodic Table, ordering the naturally occurring elements by their structure and properties. His Periodic Table changed the course of Chemistry forever, and even predicted the...
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Oxidation Reactions
Why do we cook our food wrapped in aluminium foil? Why does metal rust? It all comes down to oxidation reactions. Discover what happens to cause these reactions, and how to stop them. Chemistry - ReactionsLearning Points. The combustion...
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The Elements: Radium
Learn why radium is so radioactive it can both cause and cure cancer. Chemistry - Periodic Table - Learning Points. Marie and Pierre Curie discovered radium in 1898. Radium is a product of the radioactive decay of uranium. Exposure to...
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The Curse of Phlogiston
The 17th century German chemist Johann Becher proposed that an element, phlogiston, was released when substances burned. He was wrong, and his incorrect theory led many early chemists to misunderstand the significance of some of their...