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C2

Matthew Owen Science GCSE Inglés 58 fichas

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  1. 1Cement and concrete What is thermal decompositionIt is the chemical breakdown a compound in to atlas two other compounds under the effect of heat
  2. 2Cement and concrete What does lime some/calcium carbonate need to decomposehigh temperature
  3. 3Cement and concrete What is the word equation for thermal decomposition of calcium carbonatecalcium carbonate-----calcium oxide+carbon dioxide
  4. 4Cement and concrete How is cement madeWhen limestone and clay are heated together
  5. 5What is a composite materialit is reinforced concrete which has steel rods or steel meshes running through it and is stronger than concrete
  6. 6Cement and concrete what s the symbol equation for calcium carbonateCaCO3---- CaO + CO2
  7. 7The raw material What is graniteIt is an igneous rock and is very hard
  8. 8The raw material How ar igneous rocks formedThey are formed out of liquid rocks that cools slowly and forms interlocking crystals as it solidifies.
    It is the interlocking structure that gives it its hardness.
  9. 9The raw material What is marbleit is a metamorphic rock
  10. 10The raw material How do metamorphic rocks formwhen a rock has been under heat and pressure in the earths crust making it harder than the original rock
  11. 11The raw material What is limestoneIt is a sedimentary rock, and is the softest
  12. 12The raw material How is sedimentary rock formedIt is made up of shells of dead sea creatures that have stuck together
  13. 13Rusting and corrosion What makes rusting happen fasterAcid rain and salt water
  14. 14Rusting and corrosion Why doesn't aluminium corrode in moist airIt does not corrode in moist air because it has a protective layer of aluminium oxide which doesn't flake of the surface
  15. 15Rusting and corrosion What is rustingIt is a chemical reaction between iron, oxygen and water called oxidation, this is because iron reacts with oxygen to make oxide
  16. 16Rusting and corrosion What is the chemical name for rustinghydrated iron oxide
  17. 17Rusting and corrosion What is the word equation for rustingiron+water+oxygen---hydrated iron oxide
  18. 18Recycling Why is is good for us to recycle metalsIt is good because it means less metal ore needs to be mined
  19. 19Recycling Why is it good to Recycle iron and aluminiumsaves money and energy compared to making them from their ores
  20. 20Recycling Why is it good to recycle plasticsmeans less crude oil being used and less biodegradable waste being dumped
  21. 21Recycling why is it good to recycle batteriesReduces the dumping of toxic materials in the environment
  22. 22Materials used in cars What are the advantages of using steel to make a carsIt is stronger and harder than aluminium which is important in the event of a crash
    Car body is cheaper than a aluminium one
  23. 23Materials used in cars What are the advantages of using aluminium to make a carIt will corrode less so has a longer lifetime
    It has a better fuel economy
  24. 24Metals and alloys How can inpure copper be purified using a laboratoryIt can be purified by using an electrolysis cell
    The anode is the impure copper and dissolves in to the electrolyte
    The cathode is played with new coppers
  25. 25Metals and alloys What is electrolysisIt is the break up of a chemical compound when you break and electric current
  26. 26hh
  27. 27hh
  28. 28hh
  29. 29Recycling copper What is copper used forit is used for recycling and has to be stored carefully so that valuable pure copper scrap isn't mixed up with less pure copper
  30. 30Alloys What doe most alloys containAmalgam contains mercury
    Solder contains led and tin
  31. 31Alloys What can smart alloys doThey can be bent more than steel so they are much harder to damage
    They can change shape at different temperatures which is called shape memory
  32. 32Alloys What is in brassIt contains copper and zinc
  33. 33Alloys What are the new ways of using smart alloysIn the frames of glass to top them from breaking
    in shower heds to reduce the water supply if the temperature gets too hot
  34. 34Alloys How can surgeons use smart alloysThey can put a small piece of metal into someones blocked artery and then warm it slightly. As it warms up it changes shape into a much larger tube that holds the artery open and reduces the chance of a heart attack
  35. 35Clean air What is clean air made up of78% nitrogen 21% oxygen carbon dioxide 0.035%
  36. 36Clean air Which process in the carbon cycle uses up carbon dioxidephotosynthesis
  37. 37Clean air Over the past few centuries the percentage of carbon dioxide has increased explain why?increased enerrgy use- more fossil fuels have been burnt in power stations
    Increased population- The words energy requirement increased
    Deforestation- as more trees are cut down less photosynthesis takes place
  38. 38Pollution control You have to be able to describe the atmospheric pollutants name and describe the first oneCarbon monoxide- the origin of pollution- from incomplete combustion
  39. 39Pollution control You have to be able to describe the atmospheric pollutants name and describe the first second oneoxides of nitrogen- origin of pollutant- formed in the internal combustion of a engine
  40. 40Pollution control You have to be able to describe the atmospheric pollutants name and describe the first third oneSulphur dioxide- origin on pollutant- sulphur impurities in fossil fuels
  41. 41Pollution control What does a car catalyst doIt changes carbon monoxide into carbon dioxide
  42. 42Using fertilisers Who uses fertilisers and whyFarmers use them to boost there crop yield
  43. 43Using fertilisers What must fertilisers do before the can be absorbed by plant rootsThey must be dissolved in water
  44. 44Making fertilisers How can many fertilisers be madeMany fertilisers are salts so they can be made by reacting acids with bases
    E.g acid+base------ salt+water
  45. 45Making fertilisers Other fertilisersnitric +potassium hydroxide----- potassium + water
    Hydro meand water
    nitric means nitrate
  46. 46the dangers of fertilisers What is eutrophicationIt occurs when fertilisers are washed off the land by rainwater into rivers and lakes. Resulting in the increase of nitrate or phosphate in the water encourages algae growth,
  47. 47The hater proccess what does the hater process neediron catalyst
    high pressure
    High temp 450 degrees
    A recyling system for unreacted nitrogen and hydrogen
  48. 48The haber process What is the word eqaution for the hater proccessnitrogen + hydrogen reversable ammonia
  49. 49The haber process what is symbol equation for the haber proccessN2+3H2 reversable 2NH3
  50. 50The haber process Can a fevrsable reaction have a percentage yield of 100%No because the reaction is reversible the percentage yield cant be a 100%
  51. 51The haber process What are the factors for increasing the percantage yieldhigh pressure but costs a lot
  52. 52The haber process What are the factors for decreasing the percentage yeildHigh temperature, however high temp makes the reaction go faster
  53. 53The haber process What do catalysts doThey make the reaction go faster
    byt don't effect the yield
  54. 54What are the key features of aliminium by electrolytic decompositionthe use of aluminium oxide
    The anodes are gradually worn away by oxidation
    the process require a high electrical input
  55. 55What is the word equation for decomposition of aluminium oxidealiminium oxide-----aluminium+oxygen
  56. 56What are they features of electrolysis of dilute sulphuric acidTwo electrodes are connected to a DC soupy between 6 and 12 volts and placed into the electrolyte the electrode is connected to the negative terminal is the cathode
    The electrode is connected to the positive terminal is the anode
  57. 57What happens when the current is switched onBubbles of gas appear at both electrodes
    Water splits un to two ions H+ is the positive ion OH- is the negative ion.
    H+ is attracted o the negative cathode and is discharge as H2
    OH- is attracted to the positive anode and discharged as O2
  58. 58Which two metal does nitithol smart alloy containnikitel and titanium

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GCSE Science Fichas sobre C2, creado por Matthew Owen el 28/05/2016.
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Matthew Owen
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