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Carbon%20Cycle

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OXYGEN Oxygen participates in parts of the carbon, ... Carbon Cycle Plants Animals Industry & Vehicles Organic Material Fossil Fuels Photosynthesis Respiration ... – PowerPoint PPT presentation

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Title: Carbon%20Cycle


1
Recycling in the Biosphere
Unlike the one-way flow of energy, matter
(substances that a physical object is composed
of the matter of which the earth is made) is
recycled within and between ecosystems. Elements
(C carbon H hydrogen, N nitrogen, O
oxygen, P phosphorus) pass from one organism to
another and among parts of the biosphere through
closed loops called biogeochemical cycles, which
are powered by the flow of energy.
2
  • Recycling in the Biosphere
  • Biogeochemical cycles of matter involve
    biological processes, geological processes, and
    chemical processes.
  • As matter moves through these cycles, it is
    never created or destroyedjust changed.
  • Biogeochemical cycles of matter pass the same
    atoms and molecules around again and again.

3
  • Biological Processes
  • Biological processes consist of any and all
    activities performed by living organisms.
  • eating breathing eliminating
    waste
  • burning food (cellular respiration)
  • Geological Processes
  • Geological processes include volcanic eruptions,
    the formation and breakdown of rock, and major
    movements of matter within and below the surface
    of the earth.
  • Chemical and Physical Processes
  • Chemical and physical processes include the
    formation of clouds and precipitation, the flow
    of running water, and the action of lightning.

4
  • The Water Cycle
  • Water molecules typically enter the atmosphere
    as water vapor when they evaporate from the ocean
    or other bodies of water.
  • Water can also enter the atmosphere by
    evaporating from the leaves of plants in the
    process of transpiration.

5
  • Nutrient Cycles
  • The chemical substances that an organism needs
    to sustain life are called nutrients.
  • Every organism needs nutrients to build
    tissues and carry out life functions.
  • Nutrients pass through organisms and the
    environment through biogeochemical cycles.

6
OXYGEN Oxygen participates in parts of the
carbon, nitrogen, and phosphorus cycles
by combining with these elements and
cycling with them through parts of their
journeys. Oxygen gas in the atmosphere is
released by one of the most important of
all biological activities photosynthesis.
Oxygen is used in cellular respiration by all
multicellular forms of life, and many
single-celled organisms as well.
7
Carbon Cycle
Carbon is a major component of all organic
compounds, including carbohydrates, lipids,
proteins, and nucleic acids. Carbon dioxide is
continually exchanged through chemical and
physical processes between the atmosphere and
oceans.
8
The Carbon Cycle
9
  • The Carbon Cycle
  • Biological processes
  • 1. Plants take in carbon dioxide during
    photosynthesis and
  • use the carbon to build carbohydrates (sugar,
    starch)
  • 2. Carbohydrates then pass through food webs to
    consumers.
  • 3. Organisms release carbon in the form of carbon
    dioxide gas by respiration.
  • 4. When organisms die, decomposers break down the
    bodies, releasing carbon to the environment.

10
The Carbon Cycle
  • Geological processes
  • 5. Geologic forces can turn accumulated carbon
    into carbon-containing rocks or fossil fuels.
  • Human Activity
  • 6. Carbon dioxide is released into the atmosphere
    by volcanic activity or by human activities, such
    as the burning of fossil fuels and the clearing
    and burning of forests.

11
Carbon Cycle

SHORT TERM LONG TERM
photosynthesis respiration organisms produce wastes or decompose forms fossil fuels shells bones becomes limestone rock
http//www.youtube.com/watch?vU3SZKJVKRxQ
12
Carbon Cycle
  • HUMAN ACTIVITY (IMPACT)
  • Burning fossil fuels (vehicles, factories,
    heating systems, electricity, etc.) releases
    carbon dioxide (CO2) into the atmosphere
  • Too much CO2 in the atmosphere may lead to global
    warming!

13
The carbon cycle with and without humans
  • In 1750, WITHOUT industry vehicles, there was
    around 280 CO2 molecules in every million air
    molecules
  • In 2007, WITH industry vehicles, there is now
    380 CO2 molecules in every million air molecules
    (35 increase)
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