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Combined Science Trilogy - Chemistry - Paper 2(AQA GCSE) Latest Exam And All Verified Answers. $10.19
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Combined Science Trilogy - Chemistry - Paper 2(AQA GCSE) Latest Exam And All Verified Answers.

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  • Combined Science
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pure substance - Answer single element, compound or substance not mixed with another substance physical processes - Answer mixtures can be separated by... simple distillation - Answer evaporating water and condensing it in a separate container fractional distillation - Answer e...

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Combined Science Trilogy - Chemistry -
Paper 2(AQA GCSE) Latest Exam And All
Verified Answers.

pure substance - Answer single element, compound or substance not mixed with another substance



physical processes - Answer mixtures can be separated by...



simple distillation - Answer evaporating water and condensing it in a separate container



fractional distillation - Answer evaporating liquids with different boiling points



filtration - Answer screening and sieving to remove solids



chromatography - Answer using a solvent to separate pigments so you can identify them



crystallisation - Answer evaporating a solution to a small volume and leaving it to cool to form crystals



chemically bonded - Answer a mixture is made from different substances that aren't...



a mixture designed for a use - Answer a formulation is...



mixing components in carefully measured amounts - Answer a formulation is made by...



the solvent moves through the paper - Answer in paper chromatography...

,different compounds to different distances depending on their attraction to the paper and solvent -
Answer chromatography carries...



distance moved by compound ÷ distance moved by solvent - Answer Rf value =



single spot in all solvents - Answer in chromatography, a pure compound produces a...



damp blue litmus paper red and then bleaches it white - Answer chlorine turns...



glowing splint relight - Answer oxygen gas test makes a...



squeaky pop sound - Answer hydrogen gas test makes a...



limewater go cloudy - Answer carbon dioxide gas test makes...



warmth, shelter, food and transport - Answer the Earth provides humans with...



food, timber, clothing and fuels - Answer natural resources along with agriculture give us...



processes to make energy and materials - Answer finite resources involve...



there is only a certain amount of them - Answer finite means...



using the Earth's resources in a way that can continue in the future. - Answer sustainable resources
involves...



meet the needs of people today without impacting on the needs of people in the future - Answer
sustainable development should...



safe to drink - Answer potable water is...

, dissolved salts and microbes - Answer potable water has a low enough level of...



pure water - Answer potable water isn't...



no other substances - Answer pure water contains...



dissolved salts behind - Answer testing water purity using evaporation: evaporating water will leave...



solid residue will be left - Answer testing water purity using evaporation: the purer the water, the less...



100°C - Answer testing water purity using boiling point: pure water will boil at...



0°C - Answer testing water purity using boiling point: pure water will melt at...



agricultural and industrial processes - Answer chemistry is important in research to improve...



treat water and make it potable - Answer sterilising agents are used to...



rain water with low amounts of dissolved substances - Answer ground water is...



ground water - Answer most potable water in the UK is from...



choosing a source, filtering and sterilising the water - Answer potable water is produced by:



desalination may be used - Answer if fresh water supplies are limited...



removing salt from sea water - Answer desalination involves...

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