1. You know that the earth goes round the sun and the moon goes round the earth. You know also perhaps that there are several other bodies which, like the earth, go round the sun. They are Mercury, Venus, Mars, Jupiter, Saturn, Uranus and Neptune. All these, including our earth, are called planets of the sun. The moon is called a satellite1 of the earth because it keeps going round the earth. The other planets have also got their satellites.
2. The sun and the planets with their satellites form a happy family, called the solar system. Solar means belonging to the sun. The sun is the father of all the planets, so the whole group is called the solar system.
3. At night, you see thousands of stars in the sky. Only a few of them are planets. We can easily distinguish2 between a planet and a star. Compared to the stars, the planets are really very tiny, like our earth. But they look bigger than stars because they are much nearer to us. Compared to a star, the moon is really quite like a baby. It looks so big because it is very near to us. The real way to distinguish a star from a planet is to see whether it twinkles or not. Stars twinkle3, planets don’t. Planets shine only because they get the light of the sun. It is merely the sunshine on the planets or the moon that we see.
4. Stars are like the sun. They shine of themselves because they are very hot and burning. In fact, the sun itself is a star. It looks bigger than stars because it is much nearer. We see it as a great ball of fire in the sky. Thus our earth belongs to the family of the sun. We think the earth is very big. Compared to our tiny selves, it is truly very big. It takes weeks and months in a fast train or ship to go from one part of the earth to another. But although it seems so big, it is just like a speck of dust hanging in the air. The sun is millions of miles away and the other stars are even further away. That is why they look so small to us.
5. People who make a study of the stars are called astronomers. They tell us that long, long ago, the earth and all the planets were part of the sun.the sun was then as it is now a mass of flaming matter. It was terribly hot.Somehow little bits of the sun got loose and shot away from it.However these little B could not holy get rid of their father, the sun.It was as if a rope was tied to them and they kept whirling around the sun.
6. In this way, are also shot out from the sun. To begin with, it must have been very hot.They must have been terribly hot gases and air around it.But as it was very much smaller than the sun he started to cool.the son who is getting less and less hot but it will take millions of years to cool down. The earth took much less time to cool.
7.of course nothing could live on the earth when it was hot.There could be no man or animal or plant or tree on it. Everything would have been burnt up then.
8. just is a bit of the sun short out and we came the earth,so also a bit of the earth short out and we came the moon. Many people think that the moon came out of the great hollow which is now the Pacific ocean between America and Japan.
9. It took a long time for the earth to cool as time passed the surface of the earth became cooler although the interior remained very hot. even though if you go down a coal mine,it becomes hotter and hotter as you Go down.Probably if you code go down deep enough inside the earth, you would find it red hot.like the earth the moon also started to cool. As it was much smaller than even the earth it could more quickly than the earth.
10. when the earth cools all the water vapour in the air contains into water and came down as rain. It must have trained very heavily then.all this water filled the great hollows in the earth.thus great oceans and seas of the world were formed.
11. As the Earth and the oceans became cooler,it became possible for life to exist on the earth’s surface and also in the sea.
difficult words
Questions……
1. What makes the sun shine
2. Ans. The sunshine because it is very big
3. B. The sunshine because it gets the light of the Moon.
4. The sun shines because it is very hot and burning
5. The sun shine because we see it during the day
Right answer is the sun shines because it is very hot and burning.
2. What makes the moon shine?
A. The light of the sun falling on it
B. The light of the earth falling on it
C. The light of the stars falling on it
D. light of the satellites falling on it
Right answer is the light of the sun falling on it…
3. How big is the earth as compared to the it is only a speck of dust as compared to the sun.
4. What is satellite?
A. A natural body that moves around the
Question…1. What makes the planets shine?
2. What is meant by the solar system?
3.why does the moon look bigger than the stars?
4.What does the solar system consist of ?
5. What do we see in the sky at night?
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