LEVEL: 1st year high school
TOPIC: Carbon Cycle
SUBJECT: Science and Technology
I.
OBJECTIVE:
- Define the carbon cycle.
- Give me an example of carbon cycle.
II.
INSTRUCTIONAL MATERIAL:
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III.
DIAGRAMMATIC
LESSON PROFER:
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It is a cycle involving biological, geological and chemical processes, in which carbon
atoms are exchanged between the Earth's biosphere, pedosphere, geosphere,
hydrosphere, and the atmosphere. The carbon cycle is one of the most important cycles
of the earth and symbolizes the recycling of this abundant element throughout the
biosphere as well as in all of its organisms.
It is usually considered that there are five major reservoirs of carbon on the planet,
which are interlinked by flow of exchanges. These reservoirs are:
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The atmosphere
The terrestrial biosphere, which includes fresh water sources and other organic material like soil
carbon.
The oceans - has dissolved carbon in inorganic as well as organic living and non-living marine
flora and fauna.
The sediments which includes fossil fuels.
The planet's interior, has carbon in the earth's mantle and crust. It is vented to the atmosphere
or hydrosphere by volcanic eruptions and geothermal activities.
Let us see the carbon cycle diagram in a symbolic form first, that just illustrates the flow of
carbon in various processes amongst the various layers discussed above.
TOYOHIKO M. ORDANEZ
II-F BEED SPED