with no oxygen. 5) The oceans formed when the water vapour condensed. Phase 2- Green plants evolved and produced oxygen. 1) A lot of CO2 dissolved into the oceans. 2) Marine organisms developed which took some of this CO2. When they died the organisms were buried under layer of sediments and the CO2 became “locked up” in carbonate rocks. 3) Green plants evolve over most of the Earth. 4) Green plants removed CO2 from the air and produced O2 by photosynthesis. (oxygen level increased)
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actual chemical reactions that take place in the explosions require the use of oxidisers‚ reducing agents and binders. The additions of varying metal chlorides add the colours. An oxidizing agent producing the oxygen required to burn the mixture. An agent e.g. Sulphur‚ that burn the oxygen and produce hot gases. Binders are required to hold the mixture in a lump. The ability of producing coloured light from the principles of fireworks have allowed this technology to be used for both industrial and
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they have to face is receiving oxygen‚ which for most organisms is mostly important to their lives. The intertidal organisms use gills‚ and these gills also have the chance of drying out from the hot sun. These organisms also discovered a way to protect themselves from drying their gills‚ what they do is close off themselves and keep their neutral activities to a minimum level until the tide returns. Some other organisms have a type of lung that lets them get oxygen when they are out of the water
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Soffer performed extensive research using the aero-hydroponic method at the University of California at Davis‚ where he had received his Ph.D. in the early 1970s.The specific area of research was in quantifying the effect of various levels of dissolved oxygen on root growth‚ especially in the propagation of plants from cuttings. The findings of his research were published in the Journal of the American Society for Horticultural Science‚ and HortScience. Both studies were co-authored with David Burger
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the respiratory system and the cardiovascular system and how they work in the metabolism of energy in the body. The respiratory system The respiration system is the process of supplying oxygen to the cells so that cells can metabolise energy. The main functions of the respiratory system are to maintain oxygen supply to cells‚ to remove water from the body‚ and to remove carbon dioxide from the body. It is divided into four sections‚ three of which are under the ‘external respiration’. These are
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rubber stopper with water thoroughly. I then began the oxygen portion of the experiment where I placed some Mn into a test tube. I added some hydrogen peroxide and filled to nearly the top. I placed the rubber stopper with gas delivery system and put into the well plate in a straight postion. I filled the pipet with water and once again inverted it and placed in on top of the gas delivery system. I then watched as it became displaced with oxygen and removed it placed my thumb over it so it wouldn’t
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hydrogen and one atom of oxygen. * Calculating the Molecular Mass (Formula Mass) of a Compound 2 hydrogen atoms (atomic mass – 1) 2 * 1 = 2 1 oxygen atom (atomic mass – 16) 1 * 16 = 16 Molecular mass = 18 * Calculating the Molecular Mass (Formula Mass) of a Compound * The molecular mass of glucose‚ C6H12O6‚ can be calculated as follows: 6 carbon atoms (atomic mass – 12) 6 * 12 = 72 12 hydrogen atoms (atomic mass - 1 ) 12 * 1 = 12 6 oxygen atoms (atomic mass
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beans : From the above formula of RQ‚ we can calculate the amount Oxygen consumed‚ from gradient of the graph of mung beans with soda lime. Soda lime is known to absorb carbon dioxide‚ therefore the carbon dioxide that was released during the respiration process would be absorbed by the soda lime‚ leaving the oxygen hence the value of oxygen consumed can be determined and so to get the numerical value of the oxygen consumed‚the gradient function of the Logger pro was used as shown in
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Seventy-five % of the Earth is covered in water providing an environment for organisms to live in. the water molecule is made up of two hydrogen atoms and one oxygen atom. As oxygen atoms are more electronegative that hydrogen atoms the electrons shared covalently between the oxygen and the hydrogen atoms tend to spend more time near the oxygen atom making it partially negative and making the hydrogen atoms partially positive. The partial charges in the water molecule allow it to form weak or hydrogen
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chief and most important which is very instrumental for survival. Prime function of the respiratory system is breathing. Inhaling oxygen and exhaling carbon dioxide is all that takes plays by function of the respiratory organs. Breathing is a process by which oxygen in the air is brought in to the lungs and further in to close contact with blood. The blood absorbs the oxygen and carries to all parts of the body. Simultaneously blood gives up waste matter in form of carbon dioxide through lungs to carry
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