Biogeochemical Cycles
Biogeochemical Cycles: Overview
The biogeochemical cycles are the result of constant interaction between the biotic and abiotic components of the biosphere. In this topic, we will go through various biogeochemical cycles and their function in various life processes.
Important Questions on Biogeochemical Cycles
In which of these processes is dead organic matter broken down?
What is the role of nitrogen-fixing bacteria during plant growth?
What is precipitation? Define frozen phase of precipitation.
Among Evaporation and Condensation, which one is a warming process?
Which is the process in which the water vapour in the air is changed into liquid water?
_____ is the process in which a gaseous form changes into its liquid form.
Precipitation can occur in the form of snow.
Oxygen is returned to the atmosphere mainly by
_____ is a conversion of organic nitrogen from dead and decaying matter into ammonia by microorganism like bacteria and fungi.
_____ is a microbially facilitated process where nitrate is reduced and ultimately produces molecular nitrogen (N2) through a series of intermediate gaseous nitrogen oxide products.
_____ is the process in which conversion of ammonia or ammonium to nitrite followed by the oxidation of nitrite to nitrate.
In nature, the materials needed by all organisms in an ecosystem are reused or recycled. Nitrogen, carbon, oxygen and other nutrients move through in a predictable pattern or cycle. These nutrient cycles in nature are _____.
When common salt (or any other soluble substance) disappears in _____ on stirring, the common salt is broken down into extremely small particles which are no longer visible to the eye.
The _____ plays vital role for the execution of ascent of sap (water rise) and absorption of water (water intake) in plants.
Mention the percentage of nitrogen in atmosphere.
Which gas is used by plants during respiration? (Name the gas and do not write formula)
Of the following which nutrient is obtained by the plants from the soil:
Of the enlisted processes, state the process taking place in the following activity.
Evaporation, Dissolving, Condensation, freezing.
Drying of the rainwater from the river when the sun comes out.
What do you understand by greenhouse effect?
