IGCSE Biology 2012 exam revision notes by Samuel Lees Contents: Section I: Characteristics and classification of living organisms 1. Characteristics of living organisms 2. Classification and diversity of living organisms 2.1 Concept and use of a classificatory system 2.2 Adaptations of organisms to their environment 3. Simple Keys Section II: Organisation and maintenance of the organism 1. Cell structure and organisation 2. Levels of organisation 3. Size of specimens 4. Movement in and out
Premium Blood Cell wall Bacteria
A. Role of Chemistry in Society Applications of chemical science have contributed significantly to the advancement of human civilization (1‚ 2‚ 3). With a growing understanding and ability to manipulate chemical molecules‚ the post-World War II chemist was considered a societal problem solver. They synthesized crop-enhancing agricultural chemicals to ensure a constant and viable food supply. They played a significant role in the eradication of deadly diseases by developing life-saving pharmaceuticals
Premium Chemistry
redox reaction is one in which reduction and oxidation occurs simultaneously. (i) Cathode (Reducing electrode) : – At cathode‚ the cations gain electrons to form neutral atoms. As electrons are gained‚ the ion is said to be reduced. (ii) Anode (Oxidizing electrode) : – At anode‚ the anions lose electrons to form neutral atoms. As electrons are lost‚ the ion is said to be oxidized. Q. 8. What kind of particles will be found in a liquid compound which is a non-electrolyte? Ans.: -
Premium Electrochemistry Electrolyte Electrolysis
The Atomic and Nuclear Structure of an Atom The atom has three main components the protons‚ neutrons‚ and electrons. The protons and neutrons make up the nucleus‚ while the electrons are found outside the atom’s nucleus. Each component of an atom has a charge to it. The protons have a positive charge. The electrons have a negative charge‚ and the neutrons have a neutral charge. The atoms also have a charge. For example hydrogen can be negative‚ positive or neutral. These are called
Free Atom Electron Neutron
Subjects: Philosophy‚ classics‚ music tech and geography Notes and Revision for Geography: Links: https://sites.google.com/a/halliford.net/a-level-geography/home/exam-materials http://coolgeography.co.uk/A-level/AQA/AQA%20A%20level.htm http://web.aqa.org.uk/qual/gce/humanities/geography_materials.php Topic 1: Rivers and Flood Management. Drainage Basins: A drainage basin is an area drained by its rivers and tributaries. It is a natural system with varied inputs of precipitation
Premium Glacier
Chapter 3 Atoms and Elements 1 3.1 Elements and Symbols Chemistry: An Introduction to General‚ Organic‚ and Biological Chemistry‚ Eleventh Edition Copyright © 2012 by Pearson Education‚ Inc. Elements 2 Elements are • pure substances that cannot be separated into simpler substances by ordinary laboratory processes • the building blocks of matter • listed on the inside front cover of this text Chemistry: An Introduction to General‚ Organic‚ and Biological Chemistry‚ Eleventh Edition Copyright
Free Atom Periodic table
EXPERIMENT 2: SYNTHESIS OF ORANGE II (2-NAFTHOL ORANGE OBJECTIVE 1. To produce dye based to the coupling of diazonium. 2. To understand the characteristic of dye orange II. INTRODUCTION The first dye was introduced by William Henry Perkin on 1856. It can be produced by the coupling of diazonium sulfanilic acid with nafthol in alkaline solution.. This was the common method used to produce dye nowadays. In this experiment‚ dye produced was the orange II. Azo compound is compound that contain
Premium Azo compound Sodium chloride Dye
Chemistry GENERAL CHEMISTRY: Atomic Structure and elementary quantum mechanics: Blackbody radiation‚ Planck’s radiation law‚ photoelectric effect‚ Compton Effect‚ de Broglie’s hypothesis‚ Heisenberg’s uncertainty principle. Postulates of quantum mechanics‚ Schrodinger wave equation and a particle in a box‚ energy levels‚ wave functions and probability densities‚ Schrodinger wave equation for H-atom‚ Separation of variables‚ Radial and angular functions‚ hydrogen like wave functions‚ quantum numbers
Premium Chemistry Scientific method
Revision Plan The feedback I got back from my peers was the same throughout the workshop. What my peers told me was that I needed to be more detailed‚ because I did not reach the limit of three pages. They also told me to make sure that I not only talk about one concept but that I also talk about the other author. They told me to make sure that I even out the arguments‚ meaning that I give enough information on both concepts. I learned from my essay that I need to develop my writing techniques
Premium Psychology Writing Thought
(Revised) GCSE FOUNDATION REVISION GUIDE For Linear Course Written by MR P BENSON – Maths Tutor MARCH / APRIL 2005 VERSION 1 ISSUED FEBRUARY 2006 RE-UPDATED VERSION 2 MARCH 2008 VERSION 3 UPDATED FOR NEW SPECIFICATION 2011 CONTENTS PAGE Section Topic Page A Percentages 3 B Interest 3 C Nth Terms 3 D Ratio 4 E Lowest Common Multiples 4 F Highest Common Factors 4 G Prime Numbers 5 H Fractions
Premium Number Elementary arithmetic Googol