Teeth and Microbes A child gets first tooth when he/she is six or seven months old. At the age of three a child has usually 20 teeth. The first set of teeth is called milk teeth or temporary teeth. When the child is about six years old, the milk teeth or temporary teeth begins to …

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Planet Earth for Class 3In our solar system, our Earth is the only planet to have life. About 71 per cent of the Earth is covered with water. Because we have so much water, Earth is also called the Blue Planet.Earth looks like blue planet when seen from space.When the Earth was formed, it was …

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The Sun, Moon and Stars The Sun The Sun is a star. It is only one of millions and millions of stars in the Galaxy. It is the star closest to the Earth. It is the brightest object in the sky. It is a huge ball of very hot gases. It is made of 92.1% …

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Rocks and Soil In the beginning the earth was full of big rocks. The Sun heated up the rocks and the rain cooled them. This heating and cooling over thousands of years broke down the big rocks into smaller rocks. The smaller rocks continued to break down and formed tiny pieces of soil. If you …

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Air, Water and Weather Air is the Earth’s atmosphere. We are surrounded by air. We cannot see it but can feel the air when it blows. Moving air is called wind. It has no color or smell. Air has an indefinite shape and volume.  Air is a matter as it has mass and weight. Air around us is a mixture …

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