2) What is the estimated age of the earth? In which era did the human beings evolve?
3) On what basis scientists have said human beings and the earth did not come into existance at the same?
4) Differentiate between mesozoic era and cenozoic era.
5) What is era? Which era did the dinosaurs evolve? What is the time period of that era?
6) Write the major events that happened in Triassic, Jurassic and creataceous period?
7) Name the eras in which the following changes took place on earth?
(i) (Evolution of unicellular organism
(ii) (Evolution of human beings)
8) Write two features of palaeozoic era?
9) How is the information about ancient living beings taken?
10) In which era, were the following living beings originated?
(i) Dinosar)
(ii) (Man)
(ii) (Fish)
11) How was the evolution of living beings occured?
B. Questions Related to Fossils
1) What is fossil? What is its importance?
2) Give two conditions of fossils found in nature?
3) How is fossils formed? Explain.
4) Can all organisms be fossils? Give conditions for them to be fossils?
5) How do you identify the fossils?
6) Why do we study of fossils? Fossils are found only in sedimentary rock why?
7) What is carbon dating? What is the use of carbon dating?
8) What is external morphology?
9) How does the study of fossils helps in the evolution?
10) Name two substances where the fossils are preserved?
1) What is fossils fuel? Give example.
2) What is coal? How is coal formed? Explain.
3) Write down the importance of coal?
4) What is meneral oil?
5) Explain the formation of mineral oil?
6) What are the importance of mineral oil?
7) What is LPG? Write its importance?
8) Why is coal called fussel fuel?
9) What are the economic importance of coal?
10) In which rocks coal are found?
11) Where are the natural gases formed? Why is it called clean fuel?
12) What are the characteristics of good fuel?
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