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प्रश्न
Why do children always slide down the slide and not slide up? If this slide were there in Sunita’s spacecraft, would children slide like this? Why?
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उत्तर
Children always slide down the slide and not slide up because of the gravitational force of the earth. If this slide were in Sunita’s spacecraft, then children would not be able to enjoy the slide because of zero gravity in the spacecraft. and children cannot slide instead they would float.
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संबंधित प्रश्न
What do you think the earth looks like? Make a drawing of the earth in your notebook. On your drawing show where you are. Take a look at your friends’ drawings too.
If the earth is round like a globe, how is it that we do not fall off?
Close your eyes. Imagine that your class is a spaceship. Zooo...m – in 10 minutes you have entered space. Your spaceship is now going around the earth. Now say:
- Are you able to sit in one place?
- What about your hair?
- Oh, look … where are your bags and books going?
- what is your teacher doing? Where is her chalk?
- How did you eat your food during the break? How did you drink water? What happened to the ball that you threw up?
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!
- Can you find India?
- Where all do you find the sea?
- Which countries can you see?
- Can you see some of the countries with which India plays cricket matches? For example England, Australia, Pakistan, Bangladesh, and South Africa.
- What else can you see on the globe?
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.
See how the earth is looking. Can you see the surface of the moon? Do you have some questions after looking at this picture? Write down those questions and discuss them in the class.
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?
