Science ABC
Cellular Respiration: How Do Cells Get Energy?
Cellular respiration is the process through which the cell generates energy, in the form of ATP, using food and oxygen. The is a multistep biochemical process where food, primarily the carbohydrate glucose, is broken down to produce...
Science ABC
Can Metals Exist as Gases?
Yes, metals can exist in gaseous forms. To illustrate, let's consider lead, which has a boiling point of 1740°C. When heated past its melting point of 327°C, lead turns into a gas at 1740°C. Another notable example is mercury, which...
Science ABC
Why Does Water Evaporate at Room Temperature?
Water evaporates at room temperature because the molecules at the top of the liquid have less intermolecular attraction than those within the bulk. When the top layer is exposed to sunlight, some molecules gain enough kinetic energy to...
Science ABC
Why Do Bubbles Form In A Glass Of Water?
Water especially the one which flows through the pipe contains atmospheric gases, such as nitrogen and oxygen, dissolved in it. As the glass filled with water sits out for a few hours, its temperature rises slightly (water gets warmer),...
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Peptide
A molecule made up of a relatively short chain of amino acid building blocks. 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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Catabolism
One of the major processes in metabolism, involving the breakdown of large molecules to smaller ones with the release of energy. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...
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Molecular weight
The sum of the atomic masses of all the atoms in a molecule, usually expressed in atomic mass units. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....
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Biochemistry
The study of chemical reactions in living organisms, the chemistry of life. 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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Nanometre
One billionth of a metre. 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 curriculum...
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Diatomic
Refers to molecules that contain only two atoms. 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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Amorphous
An amorphous solid is one whose atoms or molecules are not arranged in an ordered crystalline lattice. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....
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Denature
To change the shape of a protein or amino acid molecule, disrupting its normal biological activity, but without changing it chemically. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images...
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Mass spectrometer
An instrument that analyses characteristics of atoms and molecules, including their mass. 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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Ionisation
The process of stripping electrons from, or adding them to, atoms or molecules to produce charged ions. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....
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Lattice
A regular pattern of points repeating in an identical way, and often referring to the arrangement of ions or molecules in a crystalline solid. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning...
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Activation energy
The minimum amount of energy needed to initiate a chemical reaction. 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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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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Sublimation
When a solid changes directly into a gas, without passing through a liquid stage. 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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Van der Waals Force
A type of intermolecular force that causes attraction between molecules. 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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Addition reaction
A reaction in which two molecules combine to form a larger molecule. 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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Angstrom
A very small unit of length equivalent to one ten-millionth of a millimetre, or 10-10m. 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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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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Base (biology)
In the DNA double helix, the links between the two strands are formed by pairs of much smaller molecules called bases. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise...
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Isomers
Molecules with identical molecular formulas but in which the atoms are arranged differently. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...