Search results
Results from the WOW.Com Content Network
Help; Learn to edit; Community portal; Recent changes; Upload file; Special pages
AQA Education, [1] trading as AQA (formerly the Assessment and Qualifications Alliance), is an awarding body in England, Wales and Northern Ireland. It compiles specifications and holds examinations in various subjects at GCSE, AS and A Level and offers vocational qualifications. AQA is a registered charity and independent of the government.
The A-level (Advanced Level) is a subject-based qualification conferred as part of the General Certificate of Education, as well as a school leaving qualification offered by the educational bodies in the United Kingdom and the educational authorities of British Crown dependencies to students completing secondary or pre-university education. [1]
The O grade was equivalent to a GCE Ordinary Level pass which indicated a performance equivalent to the lowest pass grade at Ordinary Level.. Over time, the validity of this system was questioned because, rather than reflecting a standard, norm referencing simply maintained a specific proportion of candidates at each grade, which in small cohorts was subject to statistical fluctuations in ...
Graded A*–E and worth up to 28 UCAS tariff points, [1] it is part of level three of the national qualifications framework. [ 2 ] The extended project was devised by Sir Mike Tomlinson in 2006, during his review of 16 to 19-year-olds' education, [ 3 ] and entered a pilot phase during the academic year 2007–8. [ 4 ]
Description: Paper applied the thermodynamic theory of steam engines to atomic level chemical reactions; i.e., it established equilibrium criteria necessary to predict the thermodynamic tendency of chemical reactions at constant temperature and pressure.
In chemistry, a reagent (/ r i ˈ eɪ dʒ ən t / ree-AY-jənt) or analytical reagent is a substance or compound added to a system to cause a chemical reaction, or test if one occurs. [1] The terms reactant and reagent are often used interchangeably, but reactant specifies a substance consumed in the course of a chemical reaction. [ 1 ]
[1] [2] Some of the commonly used grades of purity include: ACS grade is the highest level of purity, and meets the standards set by the American Chemical Society (ACS). The official descriptions of the ACS levels of purity is documented in the Reagent Chemicals publication, issued by the ACS. [3] [4] It is suitable for food and laboratory uses.