NCERT Book Class 11 Geography The Origin And Evolution Of The Earth

EXERCISES

1. Multiple choice questions.
(i) Which one of the following figures represents the age of the earth?
(a) 4.6 million years (c) 4.6 billion years
(b) 13.7 billion years (d) 13.7 trillion years
(ii) Which one of the following has the longest duration?
(a) Eons (c) Era
(b) Period (d) Epoch
(iii) Which one of the following is not related to the formation or modification of the present atmosphere?
(a) Solar winds (c) Degassing
(b) Differentiation (d) Photosynthesis
(iv) Which one of the following represents the inner planets?
(a) Planets between the sun and the earth
(b) Planets between the sun and the belt of asteroids
(c) Planets in gaseous state
(d) Planets without satellite(s)
(v) Life on the earth appeared around how many years before the present?
(a) 13.7 billion (c) 4.6 billion
(b) 3.8 million (d) 3.8 billion
2. 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
20 FUNDAMENTALS OF PHYSICAL GEOGRAPHY
(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?
3. 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.
Project Work
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) Where from has the Stardust been collected

Please refer to attached file for NCERT Class 11 Geography The Origin And Evolution Of The Earth