Q5 of 9 Page 12

Read the paragraph under the heading of “Internal structure of the earth” and answer the question.

How can you say the earth is still very active?

Our Earth is in a constant state of formation and destruction, what with the numerous volcanoes, earthquakes, the rise of mountains and subduction of land due to processes taking place deep down within the bowels of the planet. This constant state of change is why we can say the Earth is still very active.


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Look at the world map of time zone in the text page 13.

a) If you travel from Vijayawada to Paris to which time zone are you moving? ______


b) If you are travelling from Hyderabad to Tokyo which time zone are you moving? __________.

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Why is it difficult to study the formation of the earth and its structure?

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What is a grid and how does it help us ?

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Differentiate between a. Local and Standard time b. Equator and Prime meridian