Key term
AQA GCSE Combined Science Chemistry 8464
Atomic Structure and the Periodic Table
Topic overviewAtoms, elements and compoundsWord equations, symbols and balanced equationsMixturesFrom the plum pudding model to the nuclear modelBohr, Chadwick and the modern model of the atomRelative electrical charges of subatomic particlesSize and mass of atomsRelative atomic mass and electronic structureThe periodic tableDevelopment of the periodic tableMetals and non-metalsGroup 0Group 1Group 7
Bonding, Structure, and the Properties of Matter
Topic overviewChemical bonds, including metallic bondingIonic bondingIonic compoundsCovalent bonding and how it is representedThe three states of matter and changes of statePredicting state, state symbols, and the limits of the particle modelProperties of ionic compoundsProperties of small moleculesPolymers and giant covalent structuresProperties of metals and alloys, and why metals conductDiamond and graphiteGraphene and fullerenes
Chemical Analysis
Chemical Changes
Topic overviewThe reactivity seriesMetal oxides, extraction, and redox in terms of electronsAcids reacting with metals, neutralisation and saltsSoluble saltsThe pH scale and neutralisationStrong and weak acidsThe process of electrolysis, and molten ionic compoundsUsing electrolysis to extract metalsElectrolysis of aqueous solutionsRepresentation of reactions at electrodes as half equations
Chemistry of the Atmosphere
Topic overviewThe Earth's early atmosphereHow oxygen increased and carbon dioxide decreasedThe gases in today's atmosphere, and which are greenhouse gasesHuman activities which contribute to an increase in greenhouse gases in the atmosphereGlobal climate change and carbon footprintsAtmospheric pollutants from fuels, and their effects
Energy Changes
Organic Chemistry
Quantitative Chemistry
The Rate and Extent of Chemical Change
Topic overviewMeasuring the mean rate of a reactionRate from graphs, and the gradient of a tangentFactors which affect the rates of chemical reactionsCollision theory and activation energyCatalystsReversible reactions and dynamic equilibriumThe effect of changing conditions on equilibriumThe effect of changing concentrationThe effect of temperature changes on equilibriumThe effect of pressure changes on equilibrium
Using Resources
Using the Earth's resources and sustainable development
- 3 things to know
- Chemistry Paper 2
Overview
Human needs met by the Earth's resources, how agriculture supplements natural resources, finite and renewable resources, sustainable development and how chemistry improves agriculture and industry, natural products replaced by synthetic ones, and interpreting data in tables, frequency tables, bar charts and histograms, including orders of magnitude.
What you need to know
Answer each one before you reveal it.
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Key term
Which human need is met when crude oil is separated into petrol and diesel?
Key term
What is meant by a finite resource?
Questions from this subtopic
Each one with the model answer underneath.
- 1
Name four basic human needs that are met using the Earth's resources.
Model answer
Warmth, shelter, food and transport.
- 2
Which human need is met when crude oil is separated into petrol and diesel?
Model answer
Transport, because these fuels are burned in vehicle engines.
- 3
What does agriculture add to the natural resources that provide food, timber, clothing and fuels?
Model answer
It supplements them, so far larger and more reliable quantities are available than nature alone would supply.
- 4
What is meant by a finite resource?
Model answer
A resource that is being used up faster than it is replaced, so supplies will eventually run out.
- 5
From which three places are finite resources taken before being processed into energy and materials?
Model answer
The Earth, the oceans and the atmosphere.
- 6
What is sustainable development?
Model answer
Development that meets the needs of people today without preventing future generations from meeting their own needs.
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