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Ear And its Parts

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 Ear :          Hearing is as important as vision. Our ear helps us in hearing and also to maintain the balance or equilibrium of our body.  Main parts:             Ear has three main parts i.e. external ear, middle ear, and internal ear. A- External Ear:                                                 External ear consists of pinna, auditory canal and ear drum (tympanum). Pinna is the broad external part, made of cartilage and covered with skin. It helps to direct sound waves into auditory canal. There are special glands in the walls of auditory canal , which produce wax. The wax and the hairs in auditory canal protect ear from small insects, germs and dust. In additions to this, they help to maintain the temperature and dampness of auditory canal. Auditory canal ends in ear drum . This thin membrane separates external ear from middle ear. B- Middle Ear:                                           Middle ear is a chamber after external ear. Three small bones, calle
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Sahara Desert

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Sahara Desert:                           The   Sahara   (  Arabic :   الصحراء الكبرى ‎,   aṣ-ṣaḥrāʼ al-kubrá , 'the Great Desert') is a desert located on the    African continent . It is the largest    hot desert  in the world, and the third largest   desert  overall after    Antarctica  and the    Arctic.  Its area of 9,200,000 square kilometres (3,600,000 sq mi) is comparable to the area of    China  or the    United States .   The name 'Sahara' is derived from a dialectal Arabic word for "desert",   ṣaḥra   ( صحرا / ).            The desert comprises much of  North Africe, excluding the fertile region on the  Mediterranean Sea  coast, the Atlas Mountains of the  Maghreb, and the    Nile Valley in  Egypt and Sudan. It stretches from the  Red Sea in the east and the Mediterranean in the north to the  Atlantic Ocean in the west, where the landscape gradually changes from desert to coastal plains. To the south, it is bounded by the  l  Sahel, a belt of  sa
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Ponds-Natural Beauty

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Ponds-Natural Beauty:                                         A   pond   is an area filled with water, either it is natural or artificial, that is usually smaller than the  Lake .  sometimes  It may arise naturally in floodplains as a part of a river system, or be as a somewhat isolated depression (such as a   kettle  or    prairie pothole ). It may contain shallow water with marsh ,bacteria and aquatic plants and animals.            Factors impacting the type of lifes found in a pond include depth and duration of water level, nutrient level, shade, presence or absence of inlets and outlets, effects of grazing animals, and salinity.            Most Ponds are frequently man-made, or expanded beyond their original depth and bounds. Among their many uses of ponds , they provide water for agriculture and livestock, aid in habitat restoration, serve as fish hatcheries, are components of landscape architecture, may store thermal energy as solar ponds and treat  wastewater as treatme
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