4th October 1998 |
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My sisterMy sister's name is Fathima Shehnaz Fazir. She is 15 years old and she is studying in year 10 A at Muslim Ladies College. My sister is very beautiful . She helps me in my studies. Her favourite Cricketer is Ajay Jadeja. Both of us are friends. I like my only sister very much. Fathima Hafeeza Fazir
I wonder Why?The man in the box By Chamindi Ekanayake
My petMy pet is a parrot. Its name is Robin. It's green in colour. But it has a red neck and a beak. Its beak is sharp. It likes nuts and fruits. It speaks English. I love my pet very much. T.Visithra
The BrainThe brain is the important part of the Nervous system.It has four parts; cerebrum, cerebellum, ponsvaroli and mdulla oblongata. The Nervous system controls the body movement secretion of glands and the feelings. But the brain is the most important organ and is protected by strong walls. The brain has gray white matter By Hafeel Casim
Get to know mountainsMountains cover about one fifth of the surface of the Earth Mount Everest is the world's highest mountain. It is 8,848 (29 028ft) above sea level. Some mountain ranges are much older than others. The mountains in the Highlands of Scotland were formed about 400 million years ago, but the Alps are only about 15 million years old. Mountains slowly change shape as they get older and worn off by rain, wind and ice. The making of Mountains Mountains are formed by movements in the Earth's rocky crust.The layers of rocks are pushed upward, folding and breaking to form different shapes or types of mountains. As time passes erosion by frost and rain causes the mountains to split and valleys and cliffs are formed. Some mountains are formed by volcanic eruptions. The mother rock which bubbles out through holes in the Earth's crust builds up layer by layer, until it finally becomes a mountain. Volcanic mountains can build up under the ocean. The Hawaiian Islands are volcanic mountains. Ramanthi Fernando
How fish swim and seeS ince fish have no arms or legs they do not swim as we do. Instead, they use the muscles running down their body, to wriggle from side to side. They also lash their upright tail from one side to the other to push against the water and drive themselves forwards. The average fish has a streamlined shape that tapers towards the tail so that the water parts more easily as it moves. Dolphins and whales, which are sea mammals, swim in a similar fashion, except that their tails are horizontal, and their bodies move up and down. Fins In most fish the tail fin is the main propeller driving the fish forwards. The dorsal fin on the back and the anal fin near the tail help to keep the fish balanced. The remaining pairs of fins - the pectorals and the pelvics - are mainly used by the fish for steering. Flatfish, such as sole or plaice, swim with their flattened bodies sideways, and use their fins in a wave-like action. Skates and rays do the same, but in their case the body is in the upright position. A flying fish is a good swimmer but it can also glide over the water surface. Moving its tail rapidly from side to side it "taxies" over the surface, then takes off by spreading out its large pectoral fins. It can glide for up to 400 metres, and keep airborne for 20 seconds. Colour camouflage Camouflage is a feature of many fish and gives them protection. They also use it to remain hidden when after prey. Unlike land animals, a fish can be seen from all sides. To make it less visible the upper side is dark and the lower side pale. Seen from above, the dark back matches more closely the sea bed or river bottom. From below, the pale underside blends with the sky. Some fish are camouflaged with spots or stripes. This helps them to match their surroundings. A trout is spotted to imitate the pebbles over which it rests. A perch or pike will hide among water plants, waiting for something to approach before darting out to catch it. Its body is striped to blend with the stalks of rushes or reeds. Flatfish are coloured to match the sea bed. As it settles, a flatfish will wriggle its body to stir up the sand, so that it becomes half covered. It will even change its colour to match the sand and stones on which it lies. Some fish have odd shapes. The sea-horse looks totally unlike a fish and could be mistaken for a piece of seaweed. The sea-dragon is even more unrecognizable, since its body is covered with outgrowths looking like leaves. The razorfish has a very thin body and stands on its tail. In this position it can hide among the spines of a sea-urchin, or among seaweed. A real danger to skin-divers is the stone-fish. It lies on the sea bottom, looking like a stone covered in seaweed. It has a sharp spine on its back. If the spine is touched or stepped on by accident, it pierces the skin with a deadly poison. Some divers have died or lost a hand or a foot in this way. Coral fish from the tropics are brilliantly coloured, yet they are well hidden among the bright corals and seaweed. An interesting feature of some coral fish is the way their eyes are covered with a dark stripe. They also have two conspicuous "eyes" near the tail. This can confuse an enemy into attacking the wrong end. Eyesight How well a fish sees depends on what it eats. Vegetarians usually have poor sight and rely on smell and taste. Hunters are more sharp-eyed, in order to catch their prey. The blind cave fish lives in Mexico. The young have normal eyes, but skin slowly grows over them, so making the adults blind. Eyes would be useless since these fish live in permanent darkness. |
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