Docstoc

C1 – Higher Tier Revision

Document Sample
C1 – Higher Tier Revision Powered By Docstoc
					    C1 – Higher Tier Revision
                    Learning Objectives
All; To review each of the eight mini topics and produce
      flash cards for each of the higher tier concepts
   Most; To use the flash cards you have produced to
       answer a mini quiz on the high level concepts
  Some; To brainstorm any areas that you want to go
                     through tomorrow
                Revision
• You now have seven days left to revise
  properly for your first GCSE examination.
• We are going to concentrate on higher tier
  ideas in class.
• After school Revision sessions can be
  organised if people are interested.
       Flash Cards – 30 Min
• I am going to go through eight higher level
  concepts
• One for each of the topics, at the end of
  each mini revision session , you need to
  produce a mini flash card which will help
  you answer the mini quiz at the end.
• You need to summarise the information
  that I give out.
                      Cooking
• Meat – Proteins in Eggs or Meat change shape during
  cooking and are denatured.
• There are four types of protein
• 1. Primary – Amino acids are in a single chain
• 2. Secondary – The single chain goes into a coil
• 3. Tertiary – The coil is then folded up with new
  bonds.
• 4. Quaternary – More than one folded coil is joined
  together
• Potatoes – When a potato is cooked its cells walls break
  down and the starch grains burst making it easier to eat.
                Food Additives
• Active Packaging – changes the conditions of the food
  inside.
• It has a polymer and a catalyst which sucks up all the
  oxygen out of the packaging.
• Intelligent Packaging – shows how fresh the food
  inside is.
• An indicator circle in the middle darkens as the food gets
  less fresh
• Mayonnaise – The egg yolk combines the oil and the
  vinegar in mayonnaise.
• One part is hydrophobic and attaches to the oil.
• One part is hydrophilic and attaches to the vinegar.
                   Smells
• 1.Perfumes evaporate easily and are said to be
  volatile.
• They only have weak attractions between their
  particles and evaporate easily and move through
  the air through diffusion.
• Diffusion is the movement of particles from a
  high concentration to a low concentration.
• 2. Water does not dissolve nail varnish. This is
  because the force of attraction between two
  water molecules is stronger that between a
  water and a nail varnish molecule
       Making Crude Oil Useful
• Crude Oil is separated by fractional distillation because
  the fractions have different chain lengths.
• This means that the forces between the molecules are
  different.
• Long chains like bitumen have strong forces between
  them and therefore have high boiling points.
• Small chains like petrol has weak forces between them
  and therefore have low boiling points.
• Long chains turn to liquids before small chains.
• Political Pressure – Because only a few countries
  produces crude oil they can change the price as they
  wish which causes political problems.
           Making Polymers
• Drawing Displayed Formula’s is easy
• Take the monomer




• A monomer is unsaturated – has double bonds
• A polymer is saturated –has no double bonds.
• You can test to see if something is unsaturated
  by adding an alkene to bromine solution.
• If a polymer is there the bromine goes from
  orange to clear.
         Designer Polymers
• Gore-Tex is breathable and waterproof.
• The inner layer is made of PTFE which is
  hydrophobic.
• This stops the water getting through.
• It is expanded to form a membrane with
  little holes which lets water droplets
  escape of sweat escape.
          Using Carbon Fuels
• Choosing Fuels
• Coal is not good for a car because it does not
  ignite easily and produces pollution.
• Petrol and diesel are liquids so are good fuels to
  circulate in engines.
• Complete combustion
• Fuel + Oxygen  Carbon Dioxide + Water
• CH4 + O2  CO2 + H2O
• This needs to be balanced so the number of one
  elements is the same on both sides
• CH4 + 2O2  CO2 + 2H2O
                      Energy
• Bond Breaking is an endothermic process
• Bond Making is an exothermic process
• If you need more energy to break the bonds than make
  new bonds then a reactions is endothermic overall.




• If less energy is needed to break bonds than make new
  bonds then a reaction is exothermic overall.
    Higher Tier Quiz – Use the flash
     cards to see if you can win the
             quiz. – 15 Min
•   1. How does heating a protein change its shape?
•   2. Why does heating a primary protein do nothing?
•   3. Why are potatoes easier to eat after they are cooked?
•   4. How does active packaging keep food fresh for longer?
•   5. Name the two parts of an egg yolk that stops the mayonnaise separating.
•   6. What does the word volatile mean?
•   7. What stops you removing nail varnish with water?
    8. What allows us to separate fractions in a distillation column?
•   9. Do long or short chains have higher boiling point?
•   10. Look at the monomer, draw the polymer.
•   11. Is an alkene saturated or unsaturated?
•   12. What property of PTFE stops you getting wet on a hike?
•   13. Why would you not use coal in a car engine?
•   14. Write a balanced equation for the complete combustion of propane?
•   15. In a reaction, which process gives energy out?
         10 Min



What do I need to go through
  most?
Brainstorm – Last Chance
  Higher Examination End of Unit
         Review – 15 Min
• Review of the mark scheme.
• What parts did you get wrong.
• How can you improve your overall higher
  performance.
 Energy Calculations – 15 Min
• See Energy Powerpoint
Revision Quiz

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:9
posted:2/13/2012
language:
pages:16