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Substance
Material that has a definite chemical composition and distinct properties. 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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Allotropes
Different forms of the same element, composed of exactly the same atoms, in the same physical state, but in different arrangements. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...
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Isotope
Atoms of the same element with different numbers of neutrons. 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...
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Element
An element is a pure substance that cannot be broken down any further by chemical means. 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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Gene
The unit of inheritance in organisms, generally consisting of a piece of DNA that encodes the production of a specific protein. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...
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Atom
The building blocks of all matter, being the smallest unit that retains the chemical properties of an element. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Mineral (chemistry)
A naturally occurring element or compound that has a crystalline form and has been produced by geological processes. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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The Elements: Oxygen
One of the most abundant elements, oxygen is vital to all life on Earth. Chemistry - Periodic Table - Learning Points. Oxygen makes up 21% of Earth's atmosphere. Two-thirds of the human body is made of oxygen. Oxygen is essential for...
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The Elements: Lead
The durable properties of lead mean that it has been utilised by humans for thousands of years, with Roman pipes still seen today. Chemistry - Periodic Table - Learning Points. Lead is a soft, malleable metal. The Romans used lead. Lead...
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The Elements: Plutonium
Plutonium is an element with so much energy it has powered space probes beyond our Solar System. Chemistry - Periodic Table - Learning Points. Plutonium is a radioactive metal. Plutonium was named after the planet Pluto. Plutonium is...
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The Elements: Silicon
Discover the unique properties of silicon, which is found in many things from sand to computers. Chemistry - Periodic Table - Learning Points. Silicon is a metalloid element. Silicon is found in sand, quartz, the Sun and stars. Silicon...
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The Elements: Copper
Copper has been used by man for thousands of years. Chemistry - Periodic Table - Learning Points. Copper is a malleable metal. Copper is extracted from ore. Copper is a good conductor of electricity and heat. Copper helps to keep the...
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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....