GCSE Chemistry

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Author:
ghoran
ID:
158780
Filename:
GCSE Chemistry
Updated:
2012-06-14 16:24:22
Tags:
miller Urey experiment
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Description:
revision
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  1. what were the raw materials used for the miller-urey experiment
    • carbon dioxide
    • methane
    • nitrogen
    • ammonia
    • oxygen
  2. what did the primordial soup contain that was of significance
    ammino acids which are the building blocks of proteins
  3. does the primordial soup experiment explain how life started on earth . Explain your answer
    No because it only shows how some of the molecules needed for life may have been formed
  4. what does the primordial soup theory state
    • that billions of years ago , the earths atmopshere was rich in carbon dioxide methane nitrogen ammonia and oxygen
    • lightening struch causing a chemical reaction between the gases , resulting in the formation of amino acids
    • the amino acids collected in a primordial soup - a body of water out of which life gradually crawled 
    • the amino acids gradually combined to produce organic matter which eventually evolved into simple living organisms
  5. what was the process of the miller-urey experiment
    they fired an electric spark , representing lightening at a mixture of gases including  carbon dioxide methane nitrogen ammonia and oxygen representing some of the gases present in the earths early atmopshere and water representing the oceans . A mixture of chemicals formed including amino acids . This is sometimes called a primordial soup meaning a rich mixture of chemicals essential for life 
  6. explain distillation of orange peel
    • orange peel and water heated until it boils
    • water and oil vapourise
    • the distillate cools and condenses
    • oil and water seperate due to differeny densities
    • oil is decanted  
  7. explain pressing of sunflower oil
    • seeds are harvested
    • seeds are crushed
    • water is added to the crushed seeds
    • the mixture is pressed
    • water and sunflower are obtained
    • water and the sunflower oil seperate into two layers
    • water and other impurities removed
    • sunflower oil is collected
    •  

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