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oxygen cycle

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Title: oxygen cycle


1
Oxygen Cycle
2
PRESENTED BY GROUP 5
  • UMER FAROOQ.
  • ANUM AJMAL .
  • MISBAH SADIQ.
  • NOMAN HAFEEZ.

3
Overview
4
What is oxygen?
  • Is the colourless , odourless and tasteless gas.
  • Oxidation it is the process of uniting or of
    causing a substance to unite with the oxygen.

5
Discovery of oxygen.
  • Carl Wilhelm Schele a Swedish chemist who
    discovered oxygen for the first time in 1772.

6
Required for life
  • All living things use oxygen or depend on
    organisms that use oxygen in some way.

7
Biological importance of oxygen.
  • Humans need it to breathe.
  • Needed for decomposition of organic waste.
  • Water can dissolve oxygen and it is this
    dissolved oxygen that supports aquatic life.

8
All Animals and Other Consumers Use Oxygen
  • We use oxygen to break down simple sugar and
    release energy.
  • This can be done through respiration or
    fermentation.
  • Animal mainly use respiration.

9
Respiration
  • The process that breaks apart simple food
    molecules to release energy.
  • It occurs inside cells.
  • What YOU do with the oxygen you take in?

10
Cycle Of Respiration.
11
Simple Sugar Glucose
  • The molecule most living things use for energy
    including us!
  • We break down food into smaller molecules during
    digestion. One of the small molecules is glucose.
  • Glucose leaves your intestines, goes into your
    blood and is taken to every cell in your body.

12
Respiration in Cells
  • In your cells, oxygen is used to split glucose
    apart releasing energy, water and carbon
    dioxide.

13
TODAY
  • The easts atmosphere consists of 21 oxygen
  • The earths lithosphere consists of 99.5 oxygen
  • The earths hydrosphere consists of 46.60
    oxygen.
  • The earths biosphere consists of 0.01 oxygen.

14
(No Transcript)
15
Photosynthesis
  • Plants take in carbon dioxide and water and use
    them to make food. Their food is simple sugar
    glucose.

16
Releasing Of Oxygen.
17
Photosynthesis (continued)
  • Plants pull the carbon off CO2 and use the carbon
    in glucose. (They do not need the oxygen for
    this. They get that from water, H2O.)
  • Plants release the oxygen (O2) back into the
    atmosphere.
  • Other organisms use the free oxygen for
    respiration.

18
Photosynthesis and Cellular Respiration Chemical
Relation
  • Photosynthesis uses carbon dioxide and produces
    oxygen.
  • Cellular respiration uses oxygen and produces
    carbon dioxide.

19
Respiration
Photosynthesis
20
Oxygen in aquatic environment
  • This happens on land and in the water.
  • Algae and aquatic plants produce food underwater
    through photosynthesis.
  • They are present 20 in atmosphere.
  • Other aquatic organisms use the dissolved oxygen
    these plants release into the water.

21
Human Impact
  • We keep destroying natural areas, especially
    forested areas with many plants and replacing
    them with buildings, parking lots, lawns, etc.
  • Fewer plants mean less oxygen and more carbon
    dioxide.
  • This disturbs the balance of the natural cycle.

22
What We Need to Do
  • Stop destroying and promote re-growth of natural
    areas especially forests.
  • Burn less (fossil fuels, forest fires, etc.)

23
Summary.
  • Name-oxygen
  • Symbol-O
  • Atomic no.-8
  • Uses-for oxidation reactions for the respiration
    for the respiratory function of humans, animals,
    plant, some types of bacteria e.tc.
  • Sources- photolysis, photosynthesis.
  • Reservoir-biosphere, atmosphere, lithosphere.

24
SUPERVISION OF
  • SIR ABDUL BASIT AZIZ SHB.

25
  • Thank
  • you

26
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