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Definition
| Made by hydrating ethene with steam in the presence of a catalyst. |
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| Splitting up long-chain carbon atoms by passing vapour over a 400-700 degrees catalyst. |
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Definition
| Involves sugar being coverted into ethanol using yeast. It needs and lower temp and simler equipment. |
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Definition
| Joining together lots of small alkene molecules to form very large molecules called polymers. |
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Definition
| Small alkene molecules involved in polymerisation. |
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Definition
| Can't be broken down by microorganisms so they don't rot. Like polymers. |
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Definition
| Can't be broken down by microorganisms so they don't rot. Like polymers. |
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Definition
| Brazil nuts, penuts and sesame seeds. |
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Definition
| How oil is separated from crushed plant material - rather like using a spin-dryer to get water out of wet clothes. |
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Definition
| Used in food; very high enegry content; contain vitamin E; contain essential fatty acids. |
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Definition
| Contain double bonds (C=C). Liquid at room temperature. |
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Definition
| Contain single bonds (C-C). Solid at room temperature. |
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Definition
| Reacting unstaurated oils with hydrogen in the presence of a nickel catalyst at about 60 degrees. The hydrogen reacts with the double-bonded carbons and opens them out. |
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Definition
| Made up of lots of droplets of one liquid suspended in another liquid. |
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Definition
| Molecules with one part that's attracted to water, the other part attcracted to oil or fat. |
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Definition
| Attracted to water, hates oil. |
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Definition
| Attracted to oil, hates water. |
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Definition
| An accpeted theory before Wegner's that despibes bridges between continents were animals could cross. |
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Definition
| Crust, Mantle, Iron and Nickel Core. |
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Term
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Definition
| 78% nitrogen, 21% oxygen, and small amounts of carbon dioxide, noble gases and water vapour. |
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Definition
| Mostly carbon dioxide, with virtually no oxygen. There may have been small amounts of ammonia, methane and water vapour. |
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Definition
| A body of water out of which life gradually evolved. |
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