GCSEScience @GCSEScience_
Providing key revision tweets for all aspects of GCSE Science. RT to help your friends revision. Tweet questions to reinforce understanding. 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..
GCSEScience retweeted
@GCSEScience_ YEAR11!! Ice creams on sale after mass tomorrow to raise money for St Catherines!! Bring in some extra pennies!! :)
P1 revision resource: docs.google.com/presentation/d…
Will contain full information on each topic followed by past paper questions for that topic. Test yourself.
Some tricky parts to C1 - Fuel Oil question and suspension of limestone on H. Nothing in there to purposely confuse you like previous exams.
Nitrogen oxides are produced at very high temps and Nitrogen reacts with Oxygen. Sulfur Dioxide can be produced if fuel has impurities.
COMBUSTION: Complete - only produces CO2 and H2O Incomplete - produces CO2, H2O, CO and C
Fractional Distillation Crude Oil heated (vaporised into a gas) and evaporates Condenses inside the column At different temperatures
The central block of the periodic table is called the TRANSITION METALS
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.
TEST FOR UNSATURATION: Add BROMINE WATER (ORANGE) If it goes colourless then it means the substance you have added it to is UNSATURATED.
TEST FOR CARBON DIOXIDE: Bubble the gas through limewater and if it turns cloudy then its is CO2.
@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.
Monomer - a single unit of a substance Polymers - many monomers joined together
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