Composition and Structure of Atmosphere — Geography STD 11 Humanities — Question

Answer the following questions about 150 words
You have already studied geography, history, civics and economics as parts of social studies. Attempt an integration of these disciplines highlighting their interface.

Answer the following questions:
What are bio-geochemical cycles? Explain how nitrogen is fixed in the atmosphere.

Answer the following question in about 30 words:
Briefly explain the indirect sources of information of the interior of the earth other than those of seismic activity.

Answer the following question in about 150 words:
What do you understand by intrusive forms? Briefly describe various intrusive forms.

Answer the following question about 150 words:
List the stages in the evolution of the earth and explain each stage in brief.

Answer the following question in about 150 words:
What were the major post-drift discoveries that rejuvenated the interest of scientists in the study of distribution of oceans and continents?

Answer the following question in about 150 words:
Bring about the basic difference between the drift theory and Platetectonics.

Answer the following question in about 150 words.
Compare the global distribution of temperature in January over the northern and the southern hemisphere of the earth.

Answer the following question in about 150 words.
What type of vegetation would you find in the "C" and "A" type(s) of climate?

Answer the following questions:
What are the major factors that are responsible for the loss of biodiversity? What steps are needed to prevent them?