Doc Brown's Chemistry  OCR KS4 GCSE Science A Twenty First Century Science Suite

My unofficial revision support for the CHEMISTRY of the single, double, triple-separate award courses of Year 10 OCR GCSE Science and Year 11 OCR GCSE Additional Science, OCR Chemistry & OCR GCSE Additional Applied Science syllabus-specification

Copying of the quizzes by schools and colleges etc. is not permitted © Dr WP Brown

At the start of your GCSE Science-CHEMISTRY course (via broadband at school or home) ...

... How much Chemistry and Earth Science have you remembered from KS3 Science?

... click on the OCR 21st Century link at the top of this multiple choice Quiz to return to this page

My on-site help links on this page for the CHEMISTRY of the following syllabus specifications

OCR GCSE 21st Century Suite:

OCR GCSE Science A J630 Modules C1 Air Quality  *  C2 Material Choices  *  C3 Food Matters

 OCR GCSE Additional Science A J631 Modules C4 Chemical Patterns  *  C5 Chemicals of the Natural Environment  *  C6 Chemical synthesis

OCR GCSE Chemistry A J634 Module C7 Further Chemistry

 OCR GCSE Additional Applied Science A J632 Modules AP2 Agriculture and food  *  AP3 Scientific detection  *  AP4 Harnessing Chemicals

OCR 21st Century GCSE "Science" J630 Modules

C1 Air Quality * C2 Material Choices * C3 Food Matters

also further down for parts of the 'suite' "Additional Science" C4 Chemical Patterns * C5 Chemicals of the Natural Environment * C6 Chemical synthesis * "Chemistry" C7 Further Chemistry * "Additional Applied Science" AP2 Agriculture and food * AP3 Scientific detection * AP4 Harnessing Chemicals *

OCR GCSE 21st Century Science

Module C1: Air quality

For part of OCR GCSE 21st Century Science A Unit 1 examination paper Foundation (A211/01) and Higher (A211/02) and OCR GCSE Chemistry A Unit 1 Foundation (A321/01) and Higher (A321/02)

• C1.1 Which chemicals make up air, and which ones are pollutants? How do I make sense of data about air pollution?

  • Notes on the Earth's atmosphere

  • Notes on pollution and fossil fuels

  • Wordfill exercise worksheet C1.1a Composition of the Earth's Atmosphere ...

  • ... this is the first of a whole series of word-fills (via drop-down menu V) for you to do on-line (or print out and return to complete and CHECK) which offers some basic practice questions and reminders on the basic ideas and facts you need to know ...

  • The questions are very much based around the syllabus-specification statements and so act as a indicator of what you should understand and know!

  • You can click to and fro between these 'online' worksheets and work your way through a whole sequence.

  • Every word or number in the drop-down menu gap-fill choice is used at least once, and sometimes more than once, so beware!

  • The word choices are also listed in alphabetical order at the start of the exercise.

  • Three more exercises for unit section C1.1

    • Worksheet C1.1b Evolution of the Earth's atmosphere

    • Worksheet C1.1c Air pollutants

    • Worksheet C1.1d Making sense of air pollution data

  • Any user comments from students or teachers would be appreciated

• C1.2 What chemical reactions produce air pollution? What happens to these pollutants in the atmosphere?

  • Worksheet C1.2a Chemical reactions and burning fossil fuels

  • Worksheet C1.2b Air pollution chemistry

  • Any user comments from students or teachers would be appreciated

• C1.3 Is air pollution harmful to me, or to my environment?

• C1.4 What choices can we personally, locally, nationally or globally to improve air quality?

  • The Earth Science page has notes on atmospheric composition in section 1.

  • The Oil Product Notes page looks at the structure of the molecules in crude oil and their combustion and use as fuels and has 3 sections of notes on air pollution - causes, effects and control.

  • The Elements, Compounds, Mixtures Notes have sections 'what is a chemical change' and 'how to write equations'.

OCR GCSE 21st Century Science

Module C2: Material Choices

For part of OCR GCSE 21st Century Science A Unit 2 examination paper Foundation (A212/01) and Higher (A212/02) and OCR GCSE Chemistry A Unit 1 Foundation (A321/01) and Higher (A321/02)

• C2.1: What different properties do different materials have?

• C2.2: Why is crude oil important as a source of new materials such as plastics and fibres?

• C2.3: Why does it help to know about the molecular structure of materials such as plastics and fibres?

• C2.4: When buying a product, what else should we consider besides its cost and how well it does its job? How should we manage the wastes that arise from our use of materials?

  • Elements, Compounds, Mixtures Notes - Much basic chemistry on this page e.g. definitions and examples of atoms, elements, compounds and mixtures, separation methods, physical & chemical changes and sections on 'how to understand and write chemical equations' and work out the formula of a compound. Quizzes and worksheets on element symbols, formula and equations (click on icons - see key).

  • Oil and useful products - The hydrocarbons from oil, fuels, polymers/plastics, fossil fuels, environmental problems etc.

  • Extra Organic Chemistry Notes - more on polymers/plastics etc.  Use sub-index and keyword list at top of page.

OCR GCSE 21st Century Science

Module C3: Food Matters

For part of OCR GCSE 21st Century Science A Unit 3 examination paper Foundation (A213/01) and Higher (A213/02) and OCR GCSE Chemistry A Unit 1 Foundation (A321/01) and Higher (A321/02)

• C3.1: What is the difference between intensive and organic farming?

• C3.2: Why are chemicals deliberately added to food?

• C3.3: How can we make sure that our food does not contain chemicals that may be harmful to health?

• C3.4: Why does what we eat affect our health?

  • Extra Organic Chemistry Notes - Sections 16-17 Notes on naturally occurring molecules e.g. carbohydrates, amino acids and proteins etc.  Section 15 On food additives. Use sub-index and keyword list at top of page. (See also basic Oil Product notes above.)

  • Ammonia synthesis, reversible reactions and chemical equilibrium notes See sections 5. for brief notes on farming and section 6. The Nitrogen Cycle.

  • Extra Aqueous Chemistry - note on emulsifiers.

  • The Elements, Compounds, Mixtures Notes have sections on

    •  'how to write and balance equations' and how to work out formula.

  • Material structure and Types of Chemical Bonding - includes properties of ionic compounds.

OCR 21st Century GCSE "Additional Science" J631 Modules

C4 Chemical Patterns * C5 Chemicals of the Natural Environment * C6 Chemical synthesis

Students of OCR 21st C Additional Science also do/have done modules C1 to C3 above

OCR GCSE 21st Century Additional Science

Module C4: Chemical Patterns

Part of OCR GCSE 21st Century Additional Science A Unit 1 examination paper foundation (A215/01) and higher (A215/02) and for OCR 21st Century GCSE Chemistry A Unit 2 Modules C4, C5 and C6 examination paper foundation (A322/01) and higher (A322/02)

• C4.1: What are the patterns in the properties of elements?

• C4.2: How do chemists explain the patterns in the properties of the elements?

• C4.3: How do chemists explain the properties of compounds of Group 1 and Group 7 elements?

  • The Periodic Table Notes - Explanation and overview of Groups, Periods, Series etc. with links to more detailed notes on the Group 1 Alkali Metals, Group 7 Halogens, Group 0 Noble Gases and Transition Metals. Quizzes and worksheets based on the Periodic Table.

  • Group 1 The Alkali Metals Notes - Tabulated element data for lithium, sodium and potassium etc., physical and chemical properties of the metals, group trends, reactions with water, oxygen and chlorine, theory of group reactivity trend, compound formulae, uses of metals and compounds. Quizzes and worksheets on the Alkali Metals.

  • Group 7 The Halogens Notes - data, physical properties and chemistry of elements chlorine, bromine, iodine and their compounds, electrolysis of aqueous sodium chloride/brine and the uses of the products - chlorine, hydrogen and sodium hydroxide. Quizzes and worksheets on The Halogens.

  • Atomic Structure Notes - the structure of atoms, isotopes, nuclear structure notation, electronic structure and the Periodic Table. Quizzes and worksheets on atomic structure.

OCR GCSE 21st Century Additional Science

Module C5: Chemicals of the Natural Environment

Part of OCR GCSE Additional Science A Unit 2 examination paper foundation (A216/01) and higher (A216/02) and for OCR 21st Century GCSE Chemistry A Unit 2 Modules C4, C5 and C6 examination paper foundation (A322/01) and higher (A322/02)

• C5.1: What types of chemicals make up the atmosphere and hydrosphere?

• C5.2: What types of chemicals make up the lithosphere?

• C5.3: Which chemicals make up the biosphere?

• C5.4: How do we extract useful metals from minerals?

  • Earth Science Notes - Section 1a. composition of the atmosphere.

  • States of Matter - gas, liquid & solid - notes and diagrams on states, state changes, using the particle model to explain their properties. Associated Quizzes and worksheets.

  • Material structure and Types of Chemical Bonding - Part 3. covalent (simple molecules like chlorine or methane and giant structures like silica), section 3. ionic bonding theory, examples, physical properties of elements and compound explained and section 4. the structure and properties of metals.

  • The Elements, Compounds, Mixtures Notes have sections on

    • how work out formula and work out equations including use of state symbols.

  • Notes on Extraction of Metals - the extraction of copper and iron by carbon reduction and aluminium by electrolysis of the molten oxide.

  • Extra notes on Electrochemistry  - an introduction to electrolysis, theory, electrolysis cells, industrial electrolysis process links summary, experimental methods for electrolysis.

  • Chemical Calculations - Section 3. and section 6. explanation-examples and quizzes built into the notes on reacting mass calculations.

  • Ammonia synthesis - includes a discussion rates of reaction and economic production.

OCR GCSE 21st Century Additional Science

Module C6 Chemical Synthesis

Part of OCR GCSE Additional Science A Unit 3 examination paper foundation (A217/01) and higher (A217/02) and for OCR 21st Century GCSE Chemistry A Unit 2 Modules C4, C5 and C6 examination paper foundation (A322/01) and higher (A322/02)

• C6.1: Chemicals and why do we need them?

• C6.2: Planning, carrying out and controlling chemical synthesis

  • Notes on Acids, Bases, Alkalis, pH, Neutralisation and  Salts - includes theory, lots of formulae and word and balanced symbol equations, salt preparations and equations. Associated Quizzes and worksheets.

  • The Elements, Compounds, Mixtures Notes have section on how work out formula and work out equations including use of state symbols.

  • Warning symbols and hazards.

  • Ideas on risk assessment

  • Chemical Calculations - 1. to 15. sections of explanation-examples and quizzes built into the notes. Sections 2. formula mass, sections 3. & 6. on reacting mass and % & theoretical yield, section 14. % & theoretical yield, acid-alkali titration.

  • Factors affecting the rates-speeds of chemical reactions - the factors affecting reaction rates, experimental methods for obtaining data, graphs, energy change-reaction profiles and activation energies. Associated Quizzes and worksheets. See also enzymes, energy changes and coursework ideas & Ideas on risk assessment.

Module C7 - for OCR 21st Century GCSE "Chemistry" J634

Students of OCR 21st C chemistry also do/have done modules C1 to C6 above

Module C7 Further Chemistry

• C7.1: Alcohols, carboxylic acids and esters

  • Oil and useful products - section on alkanes, structure - names and their combustion equations.

  • Extra Organic Chemistry Notes - Sections 9-15 notes on alcohols, carboxylic acids, esters and fats/oils.  Use sub-index and keyword list at top of page.

• C7.2: Energy changes in chemistry

  • Notes on Energy changes-transfers in Chemical Reactions - Exothermic and endothermic energy changes, bond energy calculations, simple calorimetry. The associated m/c quiz includes revision of physical and chemical changes. Associated Quizzes and worksheets.

• C7.3: Reversible reactions and chemical equilibrium

  • Reversible reactions and chemical equilibrium notes

  • Extra Aqueous Chemistry - Theory and examples of weak acids and bases.

• C7.4: Analysis

  • Chemical Tests - Gives descriptions of lots of tests for gases and ions etc. and use the keyword alphabetical index near top of the page.

  • Elements, Compounds, Mixtures Notes - paper/thin layer chromatography analysis

  • Extra Organic Chemistry Notes - section 13 paper/thin layer chromatography analysis of organic compounds.

  • Extra Industrial Chemistry Notes - section 6. includes gas-liquid chromatography (glc).

  • Chemical Calculations - Sections 2. formula mass, sections 3. & 6. on reacting masses

  • Solution concentration and titration calculations based on reacting massess NOT involving moles this is needed for OCR GCSE 21st Century Science-CHEMISTRY for the higher tier

• C7.5: Green chemistry

  • Chemical Calculations - Sections 2. formula mass, sections 3. & 6. on reacting masses.

  • Extra Organic Chemistry Notes - Section 3. on ethanol ('alcohol') production.