...Daniel Rutherford Jacobus Henricus Walther Hermann Nernst Reinhold Benesch & Ruth Erica Benesch Find How Oxygen is Transported in Human Body Frederick Soddy Artturi Ilmari Virtanen Louis Jacques Thenard discovers hydrogen peroxide Jbir ibn Hayyn Ya'qub Al-Kindi Paul Karrer Antoine-Laurent de Lavoisier Few things are as important as water, which we know is made of oxygen and hydrogen. Did you know that Antoine Lavoisier was the discoverer of both elements? Contributions to Science Antoine-Laurent de Lavoisier is one of the most important scientists in the history of chemistry. He discovered elements, formulated a basic law of chemistry and helped create the metric system. During his time, people believed that when an object burns, a mysterious substance called ‘phlogiston’ was released. This was called the ‘phlogiston theory’. Lavoisier’s experiments demonstrated the contrary, i.e. when something burned, it actually absorbed something from the air, instead of releasing anything. He later named the ‘something’ from the air as oxygen, when he found that it combined with other chemicals to form acid. (In Greek, ‘oxy’ means sharp, referring to the sharp taste of acids.) Henry Cavendish had earlier isolated hydrogen, but he called it inflammable air. Lavoisier showed that this inflammable air burned to form a colourless liquid, which turned out to be water. The Greek word for water is ‘hydro’, so the air that burned to form water was hydrogen! Lavoisier was...
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...Handbook for Teachers Content and overview Paper/timing Content Part 1 Three texts on one theme from a range of sources. Each text has two multiple-choice questions. A text from which six paragraphs have been removed and placed in a jumbled order, together with an additional paragraph, after the text. A text followed by seven multiple-choice questions. A text or several short texts preceded by 15 multiple-matching questions. One compulsory question. Candidates are expected to be able to write non-specialised text types such as an article, a contribution to a longer piece, an essay, information sheets, a letter, a proposal, a report, a review, or a competition entry, with a focus on advising, comparing, evaluating, expressing opinions, hypothesising, justifying and persuading. Candidates are expected to demonstrate the ability to apply their knowledge of the language system by completing a number of tasks. Test focus Candidates are expected to show understanding of attitude, detail, implication, main idea, opinion, purpose, specific information, text organisation features, tone and text structure. 1 READING 1 hour 15 minutes Part 2 Part 3 Part 4 Part 1 2 WRITING 1 hour 30 minutes Part 2 Candidates choose one task from a choice of five questions (including the set text options). Part 1 Part 2 Part 3 A modified cloze test containing 12 gaps and followed by 12 multiple-choice items. A modified open cloze test containing 15 gaps. A text containing 10...
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...62118 0/nm 1/n1 2/nm 3/nm 4/nm 5/nm 6/nm 7/nm 8/nm 9/nm 1990s 0th/pt 1st/p 1th/tc 2nd/p 2th/tc 3rd/p 3th/tc 4th/pt 5th/pt 6th/pt 7th/pt 8th/pt 9th/pt 0s/pt a A AA AAA Aachen/M aardvark/SM Aaren/M Aarhus/M Aarika/M Aaron/M AB aback abacus/SM abaft Abagael/M Abagail/M abalone/SM abandoner/M abandon/LGDRS abandonment/SM abase/LGDSR abasement/S abaser/M abashed/UY abashment/MS abash/SDLG abate/DSRLG abated/U abatement/MS abater/M abattoir/SM Abba/M Abbe/M abbé/S abbess/SM Abbey/M abbey/MS Abbie/M Abbi/M Abbot/M abbot/MS Abbott/M abbr abbrev abbreviated/UA abbreviates/A abbreviate/XDSNG abbreviating/A abbreviation/M Abbye/M Abby/M ABC/M Abdel/M abdicate/NGDSX abdication/M abdomen/SM abdominal/YS abduct/DGS abduction/SM abductor/SM Abdul/M ab/DY abeam Abelard/M Abel/M Abelson/M Abe/M Aberdeen/M Abernathy/M aberrant/YS aberrational aberration/SM abet/S abetted abetting abettor/SM Abeu/M abeyance/MS abeyant Abey/M abhorred abhorrence/MS abhorrent/Y abhorrer/M abhorring abhor/S abidance/MS abide/JGSR abider/M abiding/Y Abidjan/M Abie/M Abigael/M Abigail/M Abigale/M Abilene/M ability/IMES abjection/MS abjectness/SM abject/SGPDY abjuration/SM abjuratory abjurer/M abjure/ZGSRD ablate/VGNSDX ablation/M ablative/SY ablaze abler/E ables/E ablest able/U abloom ablution/MS Ab/M ABM/S abnegate/NGSDX abnegation/M Abner/M abnormality/SM abnormal/SY aboard ...
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