Multiple choice question.

Which one of the following represents the inner planets?

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.

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?