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Antibiotic
Drugs used to treat bacterial infections by killing or inhibiting the growth of bacteria.They do not work against viruses or fungi, and so cannot treat many other infections. A Twig Science Glossary Film. Key scientific terms defined in...
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Covalent bond
A strong chemical bond formed when atoms share pairs of electrons, forming molecules. 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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Pure
Free of any unwanted substances or contaminants. 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...
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Solvent
The substance, such as water, in which another substance can dissolve. 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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Thermal decomposition
The chemical breakdown of a compound into simpler substances when heated. 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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Anhydrous compound
A compound from which all water molecules have been removed. 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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Hydrophilic
Meaning water-loving, a hydrophilic substance is one that readily associates with water. 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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Molecular formula
A formula that shows the actual numbers of atoms of each element in one molecule of a compound. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...
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Vitamin
An organic compound required by organisms in very small quantities for growth and to maintain good health. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Phospholipid
A lipid that contains a phosphate group. Lipid molecules are normally hydrophobic, which means they repel water. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Alcohol
An organic compound containing a hydroxyl group (OH) bound to a carbon atom. 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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Polyunsaturated
Chains of carbon atoms, especially in fats and oils, that contain two or more double bonds between carbon atoms. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Carbonate
A salt or other compound containing a carbonate ion CO32-. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary...
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Oxide
Any compound in which oxygen is combined with another 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...
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Acid
A compound which dissolves in water to form a solution with a pH of less than 7. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary...
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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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Functional group
An atom or group of atoms within a compound that reacts in a characteristic way, giving molecules particular chemical properties. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...
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Formulae
A chemical formula is a way of writing the composition of a compound. 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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Compound
A substance composed of more than one chemical element, whose atoms are held together by strong chemical bonds and are combined in a fixed ratio. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using...
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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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Empirical formula
A formula that shows the simplest whole number ratio of atoms 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 Glossary Films...
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ATP
Adenosine Triphosphate, a molecule that acts as an energy store in all living cells. 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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Electrolytic cell
An electrolytic cell is a system that breaks down chemical compounds by electrolysis. 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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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...