Free to use online Doc Brown's CHEMISTRY revision website by retired science education teacher notes teaching and learning revising biology chemistry physics UK GCSE IGCSE AQA Edexcel OCR GCSE IGCSE A level chemistry USA US grades India Indian Secondary s

SCROLL DOWN to follow your science course index or [USE WEBSITE SEARCH BOX] updated 06/06/2023

DOC BROWN'S SCHOOL SCIENCE EDUCATION REVISION NOTES and QUIZZES WEBSITE

WELCOME to what started life as "Doc Brown's Chemistry Clinic" !!! © Dr Phil Brown 2000+

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ENTER - THIS IS A BIG WEBSITE, so use this search box as well as the index pages e.g. enter specific science words or phrase in biology, chemistry or physics e.g. science topic, formula, compound, reaction, module, unit, examination board course, structure, homework question! in fact anything of scientific interest! This is a very comprehensive Google generated search of my website.

WEBSITE HOMEPAGE - INDEX 'SITEMAP' of revision material

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Doc Brown's Basic science quizzes designed for ~11 to 14 year old 'middle' school science students (e.g. revision stuff for UK KS3 science courses, ~US grades 6-8, India upper primary school science)

Lower School Science Quiz Links

Lower School Science - BIOLOGY Quizzes

Lower School Science - CHEMISTRY Quizzes

Lower School Science - PHYSICS Quizzes

Combined Lower School Science Quizzes

Doc Brown's Revision notes and quizzes designed for ~14 to 16 year old school science students (e.g. revision for UK GCSE 9-1, IGCSE, O level, ~US grades 9-10 science Courses, India secondary school science IX and X - biology, chemistry, physics, environmental science)

GCSE/IGCSE level BIOLOGY Revision Notes

GCSE/IGCSE level CHEMISTRY Revision Notes

GCSE/IGCSE PHYSICS Revision Notes

GCSE/IGCSE level Chemistry Revision Quizzes

and for UK based science courses:

AQA, Edexcel, OCR (Gateway & 21st C) 9-1 GCSE Sciences Revision Summary links

GCSE 9-1 Chemistry Topic Quizzes to match above specification links

Doc Brown's Revision help for ~16 to 18 year old pre-university advanced chemistry students - higher school (e.g. revision for post 16 UK advanced A level chemistry courses, IB, ~US grades 11-12, India upper secondary school XI and XII chemistry course syllabus specifications)

Advanced A level ORGANIC chemistry revision notes

Organic nomenclature quiz index - can you name organic compounds?

Advanced A level INORGANIC revision notes

Advanced A level PHYSICAL-THEORETICAL revision notes

Selected A Level chemistry multiple Choice quizzes & worksheets

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Other 'non-science' stuff

Doc Brown's Travel Pictures

I hope these web pages of 'Doc Brown's Chemistry' help your studies! and a warm welcome to the HOMEPAGE of doc b's "Chemistry Online" revision website. This was my millennium 'teaching & learning' project and Doc Brown (teacher) has been online since 2000! Its a big SCIENCE WEBSITE to get to know from a retired CHEMISTRY teacher (and some physics and general science for teaching and learning purposes), SO, use the appropriate INDEXES and Google custom 'Doc Brown's Site' SEARCH too! 'Doc Brown's Chemistry' (all material © Dr Phil Brown 2000 onwards) has lots of science revision notes & quizzes, mainly an e-learning website for chemistry, but includes some biology and physics too AND lots of 'unofficial' revision summaries for ALL the current English GCSE Science courses

Doc Brown in action in a Whitby Community College chemistry laboratory (now part of Caedmon College, Whitby) and out in the heather of the North Yorkshire Moors. Note the absence of a lab coat, hence the unseen holes in trousers, corduroy trousers are particularly susceptible to chemical attack!

IGNORE THESE NEW PAGES and RE-EDIT links for Google's cache!

natural chemical defences against disease (4) Examples of plant diseases and how they are spread (5) The control, reduction and prevention of plant diseases (6) Detection and analysis of plant diseases or nutritional deficiencies (7) Mineral nutrient deficiency in plants and its consequences May 2nd plant structure (1) Types of plant cells and their organisation into tissues and organs (2) Flowering plant transport systems structure, function of plant xylem and phloem cells (3) Structure and function of roots, absorption and necessity of nutrients, osmosis experiment (4) The importance of minerals to plants - need for absorption of nutrients through the roots (5) Investigating minerals and plants, effect of mineral deficiencies, relevance of fertilisers (6) More on leaf adaptations to aid photosynthesis and gas exchanges (7) Factors affecting the rate of transpiration and the function of the stomata and guard cells (8) An experiment to investigate the rate of transpiration - using a potometer May 22nd respiration (1) Metabolism, introduction to respiration, its significance, uses of energy released, aerobic respiration, experiment to measure your pulse rate - a simple measure of your rate of respiration (2) Aerobic respiration in plants and fungi - experiments (3) Anaerobic respiration in animals, oxygen debt and cramps (4) Anaerobic respiration in plants, bacteria and fungi (5) A quick comparison of aerobic respiration and anaerobic respiration in plants and animals (6) Experiment to investigate the anaerobic respiration rate of yeast (7) Experiment to measure the rate of aerobic respiration of woodlice using a respirometer (8) Simple calorimetry experiment to measure release of energy on burning foods like fats May 23rd skeleton 1. Bones and functions of the human skeleton 2. Muscle cells and how joints and antagonistic muscle systems work 3. Weight lifted and force needed calculations based on the action of antagonistic muscles 4. The structure and function of teeth survey (1) Introduction to investigating distribution and abundance (2) Surveying using quadrats and example of quadrat calculations based on sampling data (3) Surveying using transects (4) Estimating the percentage cover (distribution) of a species from a quadrat (5) Estimating a population size by using a capture-recapture technique and three ways of trapping animals (6) Kite diagrams to show abundance and distribution of organisms and graphs representing biodiversity-/ecology data (7) Using keys to identify organisms (8) Monitoring techniques, instruments for measuring abiotic factors - pollution, living organisms as indicators of environmental changes - indicator species transport (1) Introduction to diffusion and demonstration experiments (2) A particle model and factors affecting the rate of diffusion and Fick's Law of diffusion (3) The action of partially permeable cell membranes - selective diffusion and examples (4) Osmosis - examples and explanation (5) Some details of examples of osmotic action in individual animal or plant cell types (6) Osmosis experiments - demonstrations of osmotic action (7) Active transport - explanation and examples (8) A comparison of diffusion, osmosis and active transport May 25th big bang theory (1) An introduction to cosmological models (2) Explaining the Doppler effect in a cosmological context (3) Why do we get light from stars? How do we analyse this light? (4) In terms of cosmology, what is the red-shift? (5) How does the red-shift & Hubble equation relate to our big bang theory of the universe and origins? (6) Other evidence for the 'Big Bang Theory' of the universe May 26th electricity 1 1. Important definitions, descriptions, formulae and units for electrical science 2. The usefulness of electrical appliances in the home 3. The a.c. electricity supply to the home, wiring, insulation, and plugs (more on safety in Part 5.) 4. Power ratings of appliances in the home and rate of energy transfer 5. More on the dangers of the live wire, fuses and earthing appliances for extra safety 6. Power, energy transfer and electricity cost calculation QUESTIONS electricity 2 2.1 Definitions and what is an electric current? and what is an electrical circuit? 2.2 Circuit symbols and symbolism used in drawing-constructing circuit diagrams 2.3 Examples of simple circuits and their interpretation 2.4 More examples of comparing simple circuit diagrams 2.5 More complex bulb circuits and deducing the current flowing May 27th electricity 3 3.1 Ohm's Law, simple investigation circuit, what affects the resistance of a wire and V= IR calculations 3.2 Investigating the resistance of a wire at constant temperature, varying length and diameter 3.3 Investigating the current - voltage characteristics of a metal filament lamp - graph explained 3.4 Investigating the current - voltage characteristics of a diode - graph explained 3.5 Movement and unit of charge, the coulomb, calculations using Q = It 3.6 How are potential difference and electrical energy transfer related?, E = QV calculations 3.7 How the total potential difference is split between resistances in series electricity 4 1. Introduction - investigating a device with a simple testing circuit 2. What is an LDR? Uses of an LDR? 3. What is a thermistor? Uses? THERMISTOR 4. What is the function of a diode? Uses? DIODE 5. What is an LED? Uses of an LED? LED May 29th electricity 5 1. What you need to know about a simple series circuit 2. Calculations involving a series circuit 3. The total resistance of a circuit by adding identical resistors together in series 4. Investigating a simple parallel circuit 5. Looking at the total resistance of any parallel circuit 6. The total resistance of a circuit on adding identical resistors together in parallel 7. Extra QUESTIONS on series and parallel circuits with worked out ANSWERS electricity 6 6.1 Example of a National Grid system electricity supply 6.2 More on transmission of electricity, need for transformers in the National Grid system 6.3 Comparing advantages/disadvantages of overhead power lines versus underground cables 6.4 More detailed notes on the theory, structure and uses of transformers 6.5 More examples of the uses of transformers 6.6 Examples of transformer calculations and worked out answers electricity 8 8.1 Introduction - demonstrating and explaining static electricity 8.2 What is an electric field? 'maps' of an electric field and bringing charges together? 8.3 What happens if the static charge builds up on an object? - sparks and ionisation 8.4 More examples of static electricity, its effects in the home and anti-static agents 8.5 Some uses of static electricity effects - e.g. paint spraying, particle anti-pollution, photocopier 8.6 More on the nuisance and dangers of static electricity May 30th magnetism 9 9.1 Introduction to magnetism and magnetic fields 9.2 Magnetic fields - plotting and diagrams 9.3Magnetisation and making magnets - induced and permanent magnets 9.4 Uses of permanent magnets 9.5 The Earth's magnetic field and the compass electromagnetism 10 10.1 Introduction to electromagnetism 10.2 The solenoid coil its design and function 10.3 How can you increase the magnetic field strength of a solenoid coil? 10.4 Electromagnet uses: magnet, relay switch, bell, loudspeaker, microphone, Maglev train electricity 11 11.1 The motor effect - effect of electric current and magnetic field 11.2 Predicting direction of force, direction of motion of motor effect - Fleming's left-hand rule 11.3 Calculating the size of the force produced by the motor effect 11.4 A simple d.c. electric motor - application of motor effect 11.5 A simple a.c. electric motor and uses of electric motors 11.6 The loudspeaker - an application of the motor effect May 31st electricity 12 12.1 What is the 'generator effect'? What is electromagnetic induction? demonstrations of it? 12.2 Introduction to practical electrical generators 12.3 The alternator a.c. generator 12.4 The dynamo d.c. generator 12.5 How can you increase the p.d. and power output from a dynamo June 1st energy 0 0.1 Introduction to 'what is energy' and the 'law of conservation of energy' explained 0.2 Types of energy and energy stores and associated calculations 0.3 Types of energy store conversion, law of conservation of energy 0.4 Introduction to work done calculations, power and wasted energy involving energy stores, energy transfers, mechanical work and power calculations - questions with worked out answers June 2nd energy 1 1. Summary of energy resources and methods of generating electricity 2. Energy resources and their uses - a general global survey and global trends 3. Comparing renewable and non-renewable sources of energy including biofuels 4. Summary of typical uses of energy - fuels, electricity etc. 5. Quick summary comparison of advantages and disadvantages of energy resources June 3rd energy 7 1. Law of conservation of energy and analysis of energy transfers 2. Energy transfer and useful work output and formula for efficiency, Sankey diagrams and wasted energy and energy analysis of using electrical appliances, calculation questions with worked out answers 3. Costs, efficiency and pay-back time for a variety of energy strategies, examples of reducing unwanted energy transfers including friction and air resistance June 6th mbd nh3 ?

The mediocre teacher tells.

The good teacher explains.

The superior teacher demonstrates.

The great teacher inspires.

William Arthur Ward "Thinking minds"

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