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Biogeochemical Cycles
Chapter Name : Natural Resources
Sub Topic Code : 103_09_14_05_03
Topic Name : Biogeochemical Cycles
Sub Topic Name : The Carbon -Cycle
Introduction

Carbon is incorporated in life forms via photosynthesis, then converted to glucose and made into biologically important molecules which are further utilized and carbon dioxide is generated which goes back again to the atmosphere.

Pre-Requisites:

Presence of carbon dioxide in atmosphere.

Real Life Question:

All organisms are made up of carbon. But have you ever thought where in body is carbon present and how it comes inside the body?

Key Words / FlashCards
Key Words Definitions (pref. in our own words)
Presence of carbon Found in the elemental form as diamond and graphite. Found as carbon dioxide, as carbonate and hydrogen-carbonate salts in various minerals, in life forms in form of carbohydrates, proteins, etc. the exoskeleton and endoskeleton of animals is also formed of carbonate salts.
Photosynthesis Process which incorporates carbon in life forms containing chlorophyll. Converts carbon dioxide from the atmosphere into glucose molecules which is used for synthesis of biologically important molecules.
Combustion process Another process which adds carbon dioxide in the atmosphere. Burning of fuels to provide energy for processes like heating, cooking, transportation etc.
Increased percentage of carbon dioxide The percentage of carbon dioxide in the atmosphere is doubled due to the industrial revolution.
Learning aids / Gadgets
Gadgets How it can be used
Encyclopedia and internet Try to find about the global carbon prints and increasing carbon credits.
Real life uses :

Carbon is present in almost everything existing on the earth in some or the other form.

Practical examples around us
Examples Explainations
What you learn in Theory:

Carbon is repeatedly cycled through different forms by the various physical and biological activities.

What you learn in Practice:

How carbon enters the life forms and is returned back again to the atmosphere.

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