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GCSEScience @GCSEScience_
Joined March 2015
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..and application required. Whether you did three, six or nine exams well done to everybody. Enjoy your summer.
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That's it. All done. Well done to everybody. Science GCSEs can't be compared with any other in terms of amount of knowledge, understanding..
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GCSEScience retweeted
Miss McGarry @MathsMac
11 Jun 2015
@GCSEScience_ YEAR11!! Ice creams on sale after mass tomorrow to raise money for St Catherines!! Bring in some extra pennies!! :)
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P1 revision resource: docs.google.com/presentation…
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Will contain full information on each topic followed by past paper questions for that topic. Test yourself.
Fantastic P1 revision resource being uploaded.
Some tricky parts to C1 - Fuel Oil question and suspension of limestone on H. Nothing in there to purposely confuse you like previous exams.
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Sulfur Dioxide causes acid rain.
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Nitrogen oxides are produced at very high temps and Nitrogen reacts with Oxygen. Sulfur Dioxide can be produced if fuel has impurities.
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COMBUSTION: Complete - only produces CO2 and H2O Incomplete - produces CO2, H2O, CO and C
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Fractional Distillation Crude Oil heated (vaporised into a gas) and evaporates Condenses inside the column At different temperatures
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The central block of the periodic table is called the TRANSITION METALS
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Atoms in the same group have the same number of electrons in their outer shell. Atoms in the NOBLE GASES have a full outer shell.
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TEST FOR UNSATURATION: Add BROMINE WATER (ORANGE) If it goes colourless then it means the substance you have added it to is UNSATURATED.
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TEST FOR CARBON DIOXIDE: Bubble the gas through limewater and if it turns cloudy then its is CO2.
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@gentleackles now look at table: Biodiesel releases less carbon dioxide and no sulfur dioxide Petrol releases large CO2 and sulfur dioxide
@gentleackles biodiesel is comes from crops that are grown where food should be grown meaning food shortages.
@gentleackles biodiesel is from a plant - renewable. Petrol is from crude oil - non renewable and running out.
This is called polymerisation. Heat is required to break double bond in monomer. Polystyrene is made from Styrene monomers.
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Monomer - a single unit of a substance Polymers - many monomers joined together
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