IGSCE Chemistry Notes Oxides Oxides are used to determine whether an element is a metal or a non-metal. Most non-metals are classed as acidic oxides. While most metals are classed as basicoxides. Acidic Oxides * Reacts with water to form acids * Neutralises alkaline solution to form salt + water Basic Oxides * Neutralises acidic solutions to form salt + water Amphoeteric Oxides * These are non-metals which display both acidic and basic properties Alkaline Oxides * Reacts
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Edexcel IGCSE Maths 2 Answers to activities and exercises Unit 1 NUMBER 11 ACTIVITY 1 Time (h) Speed (km/h) 1 160 2 80 4 40 6 26.7 7 22.9 8 20 EXERCISE 1 1 a 4 days 2 3 4 5 6 7 8 a a a a a a a 28 days 8 men 12 people 60 years 40 000 men 12 hours 32 km/litre b 2 days b b b b b b b 6 days 16 men 8 people 15 years 20 000 men 72 km/h 20 litres c 2 c c c c c 2 days 3 4.8 days 32 men 6 people 1200 years 400 men EXERCISE 1* 1 a Number of light bulbs (N) 6 5 2 30 b 3000 = NP 2 a Number of
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EXAMINERER TIPS for IGCSE History 0470 Good revision is not just learning your history but also how you use it to get the best grade you can. General advice Preparing to get a good grade begins as soon as you start your IGCSE course. You can prepare by: • finding out what you need to know. • organising your notes. Make a list of the topics studied under the headings ‘Core content’ and ‘Depth or Nineteenth/Twentieth Century Studies’. • knowing how your IGCSE papers are structured and practising past
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IGCSE Paper 2 Tips Part 1 – Passage A ● Question 1 ○ Read the question first. ○ Read Passage A with the question in mind. ○ Look at the question again to make sure you understand. ○ IMPORTANT: whatever the question asks you to create‚ it is VITAL that you include details from Passage A but EQUALLY VITAL that you include your own original ideas/details. ○ The mark scheme’s top band says that the best marks will be awarded to students who make inferences from the information that is already there and
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IGCSE ECONOMICS NOTES The economic problem (Ch. 1) - All materials on the earth (resources) are scarce (scarcity). - Resources are used to make goods and services. - Some resources like air are free. - All people have basic needs to survive i.e. food‚ air‚ water and shelter. - People want more than they need . - Wants are unlimited. - The economic problem is how to decide the allocation of scarce resources to meet unlimited wants. - Scarce resources have many alternative uses. - The cost
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Psychology Notes – Memory Flow of information in memory: Encoding Storage Retrieval Key terms: Encoding: changing information so that it can be stored Storage: holding information in the memory system Retrieval: recovering information from storage Multi-store: the idea that information passes through a series of memory stores Sensory store: holds information received from the senses for a very short period of time Short-term store: holds approximately seven chunks of information for
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To What Extent Godalming a Clone Town? By Matilda Pegler Candidate Number: Centre Name: King Edwards School‚ Witley‚ GU8 5SG Centre Number: Contents: Introduction to Godalming. INTRODUCTION Godalming is situated in the centre of the Borough of Waverley in Surrey‚ England‚ 4 miles (6.4km) SSW of Guildford‚ it is 30.5 miles (49.1 km) southwest of London and is regarded as an expensive residential town‚ due to its visual appeal and easily accessible transport links. The question I am researching
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ECONOMICS GLOSSARY YEARS 10 & 11 A Term Definition Absolute advantage The ability to produce a good or service at an `absolutely` lower cost. Absolute or nominal prices The prices that we observe today in terms of today’s pounds. Also called nominal or current prices. Aggregate demand All planned expenditures for the entire economy added together. Aggregate demand curve Planned purchase rates for all goods and services in the economy at various
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BATTERIES What is a battery? A battery is a container consisting of one or more cells carrying an electric charge and used as a source of power. SECONDARY BATTERIES * rechargeable * high cost (short-term) low cost (long-term) * used in objects with high energy requirements: e.g. mobile phones‚ power tools * require special handling‚ containment & disposal * limited interchangeability * long life time * produce smaller amount of waste (flat discharge curve)
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IGCSE History Revision Charts 1. Were the peace treaties fair of 1919-21? -The Big Three (USA‚ France‚ Britain) gathered in Paris for the treaty of Versailles -USA believed in self determination at a strong way. -Britain and France wanted to make Germany pay a lot of reparations as well to gain other colonies‚ as a punishment for WWI. France wanted at an alarming rate to punish Germany. -The treaties could be justified because they had to control Germany and make sure it wouldn’t go to
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