Providing key revision tweets for all aspects of GCSE Science. RT to help your friends revision. Tweet questions to reinforce understanding.
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..and application required. Whether you did three, six or nine exams well done to everybody. Enjoy your summer.
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!! :)
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.
Fractional Distillation
Crude Oil heated (vaporised into a gas) and evaporates
Condenses inside the column
At different temperatures
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.
@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.
