Revision (The Carbon Cycle)|The Carbon Cycle (Greenhouse Effect)|Oxygen Cycle |Oxygen Layer |Important Questions |Summary

The Oxygen Cycle

Oxygen cycle || Green house effect || Ozone layer

Nitrogen Cycle|Greenhouse Effect And Global Warming|Ozone Layer Formation

Describe carbon cycle.

What is carbon cycle?

Explain carbon cycle.

What is carbon cycle?

The role of bacteria in carbon cycle is

Biogeochemical Cycle |Biogeochemical Cycle (The Water Cycle)|Biogeochemical Cycle (The Nitrogen Cycle)|Biogeochemical Cycle (The Carbon Cycle)|Carbon Cycle (Greenhouse Effect)|Summary