Name: __________________________________ ( ) Class: 4Q HWA CHONG INSTITUTION PRELIMINARY EXAMINATION 2010 CHEMISTRY 5072 Paper 1 Time: 1 hour INSTRUCTIONS TO CANDIDATES Do not turn the pages over until you are told to do so. Write your name and index number on the answer sheet in the spaces provided. There are forty questions on this paper. Attempt all questions. For each question‚ there are four possible answers labelled A‚ B‚ C and D. Choose the one you consider correct and
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* Microbiology: Study of microorganisms Most microorganisms are pathogenicFalse The majority of bacteria are harmless True Total number of bacterial species: about 10 million to a billion What is a microorganism? An organism or virus too small to be seen without a microscope. (Smaller than 0.5 mm) Ex: Bacteria‚ Fungi‚ Protozoa‚ Algae‚ and Viruses Microbiom: collection of microbes Human cells vs. Microbial cells = 1:10 Which statement about Michaelangelo is not correct? A. He was
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education *1144188971* COMBINED SCIENCE Paper 2 (Core) 0653/21 October/November 2010 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams‚ graphs‚ tables or rough working
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1. Hydrogen Name: Hydrogen Atomic number: 1 Atomic Weight: 1.00794 grams/mole Standard state: gas at 198 K Hydrogen is the lightest Hydrogen is the lightest element. It is by far the most abundant element in the universe and makes up above 90% of Universe by weight. Hydrogen as water (H2O) is absolutely essential to life and it is present in all organic compounds. Hydrogen is lightest gas. Hydrogen gas was used in lighter-than-air balloons for transport but is far too dangerous because
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY Paper 1 Multiple Choice May/June 2005 1 hour Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 5070/01 w w w e tr .X m eP e ap .c rs om READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the answer
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PHYSICAL SCIENCE I. HISTORICAL BACKGROUND A. Babylonians They recorded eclipses and they were able to predict future eclipses. They named the twelve divisions of the Zodiacs‚ divided the northern sky into constellation and gave their present names. Their priest recorded planetary motions especially those of Venus‚ geometry and mathematics were highly developed by these people. There were evidences of multiplication tables and tables of square and cubes. They created standards for measuring length
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1. Prehistoric Times - Beginning of the Christian Era (Black Magic) Existence of Fire Arguably the first chemical reaction used in a controlled manner was fire. However‚ for millennia fire was simply a mystical force that could transform one substance into another while producing heat and light. Fire affected many aspects of early societies. These ranged from the simplest facets of everyday life‚ such as cooking and habitat lighting‚ to more advanced technologies‚ such as pottery‚ bricks‚ and
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EAS 199A Lecture Notes: Basic Electricity Fall 2011 This course module introduces the basic physical models by which we explain the flow of electricity. The Bohr model of an atom – a nucleus surrounded by shells of electrons traveling in discrete orbits – is presented. Electrical current is described as a flow of electrons. Ohm’s law – the relationship between voltage‚ current and electrical resistance – is introduced. Learning Objectives Understanding the basic principles of electricity is
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------------------------------------------------- PASSWORDS * Special Passwords In versus mode‚ enter the following info to get the desired effect: Effect | Password | Boss: High Abbott (appears in invisible box in lower right-hand corner) | J Rubin‚ Jan 6 1970 | Boss: Kull (appears in invisible box in lower right-hand corner) | A Gavin‚ Jun 11 1970 | Character: Black Dragon | Eyvern‚ March 9‚ 1927 | Character: Gulab Jamun | Gulab‚ February 29‚ 1900 | Character: Major Trouble |
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ySmoking and young people http://www.leedscommunityhealthcare.nhs.uk/what_we_do/specialist_services1/stop_smoking_service1/smoking_and_young_people/ A STRIKING approach for young people in Leeds! Striking is a tobacco prevention / cessation package for young people in Leeds which has been piloted and evaluated in three secondary schools. Striking aims to prevent the uptake and reduce smoking prevalence in young people across Leeds‚ increase knowledge and skills and support young people to make
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