Alternative transcript:

diffrent hydrocarbons, the diffrent compounds in crude oil are seperated by fractional 20 °C distilation Butane & Propane Crude Oil The oil is heated in a furnace 150°C TITL 200 °C 300°C கூட 370 °C 400 °C Petrol Kerosene Diesel Fuel Oil Lubricating oil, Parrafin Wax, Asphalt splitting up long-chain hydrogens means -Cracking -Methods of cracking Steam cracking • Catalytic cracking -Alkenes have a C=C double bond - Alkenes burn with a smokey flame - Alkenes react via addition reaction substance is -In chemistry, a pure substance contains one compound or element is -Boiling and melting point tells you is Evolution the atmosphere of Phase one-Volcanoes something how only pure a out gave gases -Early atmosphere was mostly carbon dioxide -Volcanoes also released nitrogen, water vapour and small amounts of methane Phase two-Oceans, algae and green plants -Overtime, a lot of carbon dioxide was removed from the atmosphere -Lots oceans of carbon dioxide dissolved in the -When green plants and algea evolved, they look in some carbon dioxide during photosynthesis Phase three-Green plants and algea produced oxygen - Algea evolved 2.7 billion and years ago build up billion, making oxygen green plants over the next and climate change greenhouse gas gases include carbon dioxide, methane and Greenhouse -Carbon dioxide is gases - Greenhouse water vapour - Some forms of human activity increases the amount of greenhouse gases, such as: Deforistation • Burning fosil fuels Agriculture • Creating waste - Increasing carbon dioxide is linked with climate change temperature of the earth's - Over the the years, average Surface has increased, which is caused by human activity -Climate change Such as: • Ice melting in the Artic or antartic, Killing sea levels to rise and causing Change in rainful • Storms become more. frequent and seure can have dangerous consequences habitats Carbon footprint -Carbon footprints are dioxide and other greenhouse gases released cyck of something. Examples: •A Service •An event • A product -There are Using renewable ways •Using Sources less a process uses • Governments putting a limit on - Making reduction is still difficult the amount measure of to reduce carbon footprint, such as: energy that Air pollution -Combustion of fossil fuels release particles Complete • around all over to prevent rusting: barrier -Main ways • Coat iron with • More reactive metals. a of the full carbon and gases combustion - When theres plenty of oxygen of the fuel burns energy emmisions companies make -Incomplete combustion - When there isn't enough oxygen the fuel does not burn around some of Corrosion -Iron and steel corrode more than aluminium - Experiments show that air and water are needed for iron to cust