Solution of Chapter 2. The Origin and Evolution of the Earth (NCERT - Fundamental of Physical Geography Book)

Multiple choice question.

Which one of the following figures represent the age of the earth?

Multiple choice question.

Which one of the following has the longest duration?

Multiple choice question.

Which one of the following is not related to the formation or modification of the present atmosphere?

Multiple choice question.

Which one of the following represents the inner planets?

Multiple choice question.

Life on the earth appeared around how many years before the present?

Answer the following questions in about 30 words.

(i) Why are the terrestrial planets rocky?

(ii) What is the basic difference in the arguments related to the origin of the earth given by :

A. Kant and Laplace

B. Chamberlain and Moulton

(iii) What is meant by the process of differentiation?

(iv) What was the nature of the earth surface initially?

(v) What were the gases which initially formed the earth’s atmosphere?

Answer the following questions in about 150 words.

(i) Write an explanatory note on the ‘Big Bang Theory’.

(ii) List the stages in the evolution of the earth and explain each stage in brief.

Collect information about the project “Stardust” (website: www.sci.edu/public.html and www.nasm.edu) along the following lines.

(i) Which is the agency that has launched this project?

(ii) Why are scientists interested in collecting Stardust?

(iii) Wherefrom the Stardust is being collected?

Why are the inner planets rocky while others are mostly in gaseous form?

How was the layered structure of the earth developed?