Q19 of 32 Page 157

Even though we do not have a clock, we can know the time by observing some shadows in day time. Think and discuss with your friends how we can know the time at night.

We can know the time at night by observing the positions of The Great Bear constellation and the pole star. We can think pole star as the center of the clock and The Great Bear constellation as the hand of the clock. Every hour constellation moves by 15ο per hour. In this way, we can know the time at night.


More from this chapter

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17

While observing the shadow of a stick from morning to evening, some questions arose in Ramya’s mind. What may be those questions?

 18

What are the questions that engage your mind when you look at the night sky?

 20

How can you find north-south direction at your place?

 21

In which direction (towards north or south) is the sun moving day by day when you read this lesson?