Q23 of 32 Page 157

What is the duration of a day and night today? Collect the information about the duration of day night for the past 7 days from the newspapers, analyze it and say whether summer or winter is going to come.

This is the month of December. Duration of the day is 11 hours 15 minutes and night length is 12 hours 45 minutes.


Fig- Day length of Andhra Pradesh during December 2017.


You can calculate night length by subtracting day length from 24.


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21

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

 22

What are the planets you have seen in the sky? When do you observe those planets?

 24

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 25

Collect information about cosmic dust (wastage) from news papers, internet and make a poster on your school panel board about the consequences of cosmic dust.