Take a 5 rupee coin and a small piece of paper. The paper should be about one-fourth the size of the coin. Hold the coin in one hand and the paper in the other. Drop them at the same time. - Environmental Studies

Take a 5 rupee coin and a small piece of paper. The paper should be about one-fourth the size of the coin.

Hold the coin in one hand and the paper in the other. Drop them at the same time. What happened?
Now place the tiny paper on the coin and drop them. What happened this time? Surprised!

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Sunita in Space

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Chapter 11: Sunita in Space - Sunita in Space [Page 104]

Chapter 11 Sunita in Space
Sunita in Space | Q 6 | Page 104

Look at Sunita’s photographs and the dates written on each of them. Write what all is happening and when?

Can you now say why Sunita’s hair kept standing?

Think why water flows downwards on any slope. On mountains, water flows downwards, not upwards.

Do you think the moon is flat like the coin or round like a ball?

When is the next full moon? At what time will the moon rise on this day? What does the moon look like on this day? Draw it.

At night look at the sky carefully for 5 minutes.

What could you see?
Did you see anything moving in the sky? What do you think it could be? A star or a shooting star or a satellite (satellites are used for the TV, telephones, and for weather reports). Find out more about this.

Given below are the times at which the moon rises and sets in Delhi (on the given days).

Date	Time of moonrise (hours: minutes)	Time of moon (hours: minutes)set
28-10-2007	19:16	08:50
29-10-2007	20:17	10:03
30-10-2007	21:22	11:08
31-10-2007	22:29	12:03

On 28 October the moon came out at ___ minutes past ___ o’clock.
On 29 October the moon came out at ___ minutes past ___ o’clock.
On 29 October there was a difference of ___ hours and ___ minutes in the time of the moonrise (as compared to 28 October).

Why do we see stars mostly at night?

Why don’t you try to do the same with a coin? How many centimeters away from the eye did you keep the coin to hide the moon?

If you saw the moon rising at 7 pm today, would you see it at the same time tomorrow?