Paragraph on “When did wool first become widely used?” complete paragraph for Class 9, Class 10, Class 11 and Class 12

When did wool first become widely used?   Ever since the days of Ancient Greece, wool has played a very important part in clothing. Roman togas were made of wool and it continued to be woven during the Dark Ages. In fact, it was the only material available to most people. The woollen clothes worn during the first half of the Middle Ages were simple and made for warmth. Houses and...
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Paragraph on “Who wove the finest linen in the Ancient World?” complete paragraph for Class 9, Class 10, Class 11 and Class 12

Who wove the finest linen in the Ancient World?   The ancient Egyptians grew an enormous amount of flax which was then spun and woven into linen. Linen is strong and cool and smooth to wear, and Egyptian linen was incredibly fine, sometimes almost trans-parent. This fine weaving has never been matched, even with the advanced machines used in textile mills today. It was the quality of material that distinguished the...
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Paragraph on “When did man first wear clothes?” complete paragraph for Class 9, Class 10, Class 11 and Class 12

When did man first wear clothes?   Look at the clothes you are wearing, you will ‘ find that they are made of a great variety of fabrics. We are fortunate that they are all available, imagine what it must have been like with nothing to protect you from the bitterest weather! We do not know when man first wore clothes, but large numbers of flint scrapers found in Old Stone...
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Paragraph on “What other kinds of energy can we use?” complete paragraph for Class 9, Class 10, Class 11 and Class 12

What other kinds of energy can we use? You have seen in the previous question the stages through which the Sun’s energy passes before we can tap it as the fossil fuel, petrol. It has taken millions of years for the world’s reserves of oil to be built up and we have consumed much of it in a few decades. We need energy in our homes and in industry and for...
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Paragraph on “How do we know what the bottoms of oceans are like?” complete paragraph for Class 9, Class 10, Class 11 and Class 12

How do we know what the bottoms of oceans are like? Over two-thirds of the Earth’s surface is covered with water. Most of this is very deep and we call it ocean. People cannot go down very far because the pressure of the water on them increases the deeper they go. Deep-sea divers wear protective clothing to stop their bodies being crushed. However, people have gone down to great depths using...
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Paragraph on “Can water climb?” complete paragraph for Class 9, Class 10, Class 11 and Class 12

Can water climb?   Water usually flows downwards, pulled by the force of gravity. However, in certain circumstances, it can move upwards or climb! If you place a thick and a thin plastic straw in a beaker of coloured Water, the water will rise up the straws above the level of the water in the beaker. The water will rise further up the thin straw than the thick straw. The ability...
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