IGCSE Glossary

Glossaries - GCSE chemistry

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Glossaries - GCSE chemistry

The Tutors' Association (TTA) is the only professional membership body for tutoring and the wider supplementary education sector in the UK and is recognised as such by the UK Government. Becoming a member of The Tutors' Association signifies a commitment to the profession, and to upholding the highest standards of safeguarding, professional practice and ethical behaviour.

Glossaries - GCSE chemistry

In chemistry, a suspension is a heterogeneous mixture that contains solid particles sufficiently large for sedimentation. The particles may be visible to the naked eye, usually must be larger than 1 micrometer, and will eventually settle.

Glossaries - GCSE chemistry

Starch or amylum is a polymeric carbohydrate consisting of numerous glucose units joined by glycosidic bonds. This polysaccharide is produced by most green plants for energy storage. Worldwide, it is the most common carbohydrate in human diets, and is contained in large amounts in staple foods like wheat, potatoes, maize (corn), rice, and cassava (manioc).

Glossaries - GCSE chemistry

A substance ( usually a liquid like water) which will dissolve another substance

Glossaries - GCSE chemistry

A solution is a liquid mixture in which a solute is distributed within a solvent.

Glossaries - GCSE chemistry

The minor component in a solution, dissolved in the solvent.

Glossaries - GCSE chemistry

A substance is soluble when is can dissolve in another substance ( the solvent)

Glossaries - GCSE chemistry

A substance able to be dissolved in a liquid.

Glossaries - GCSE chemistry

Solubility is the measure of how much solute can be added to a solvent until it becomes a saturated solution. The solubility is measured in grams of solute per hundred grams of solvent.

Glossaries - GCSE chemistry

Glossaries - GCSE chemistry

A solution becomes a saturated solution when it has the maximum concentration of a solute dissolved in a solvent. After it is saturated any additional solute will not dissolve into the saturated solution.

Glossaries - GCSE chemistry

Science, technology, engineering, and mathematics (STEM) is a broad term used to group together these academic disciplines. This term is typically used to address an education policy or curriculum choices in schools. It has implications for workforce development, national security concerns and immigration policy. The science in STEM typically refers to two out of the three major branches of science: natural sciences, including biology, physics, and chemistry; and formal sciences, of which mathematics is an example, along with logic and statistics.

Glossaries - GCSE chemistry

Ribosomal RNA   (rRNA)

The RNA found in ribosomes. It is a single stranded molecule made of a chain of ribonucleotides. Ribonucleotides are made of a sugar (ribose), a phosphate group and one of four different bases (A,G,C or U).

Glossaries - GCSE chemistry

A reducing sugar is any sugar that is capable of acting as a reducing agent. In an alkaline solution, a reducing sugar forms some aldehyde or ketone, which allows it to act as a reducing agent, for example in Benedict's reagent. In such a reaction, the sugar becomes a carboxylic acid.