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Ask QuestionPosted by Reena Chand 6 years, 7 months ago
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Posted by Satyam Singh 6 years, 7 months ago
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Sia ? 6 years, 7 months ago
वैदिक काल से ही हमारे पूर्वजों ने ‘निरोगी काया’ अर्थात् स्वस्थ शरीर को प्रमुख सुख माना है । खेल अथवा व्यायाम स्वस्थ शरीर के लिए अति आवश्यक हैं अर्थात् शरीर को स्वस्थ रखने के लिए खेल अथवा व्यायाम की उतनी ही आवश्यकता है जितनी कि जीवन को जीने के लिए भोजन व पानी की ।
विद्यार्थी जीवन मानव जीवन की आधारशिला है । इस काल में आत्मसात् की गई समस्त अच्छी-बुरी आदतों का मानव जीवन पर स्थाई प्रभाव पड़ता है । अध्ययन के साथ-साथ व्यायाम मनुष्य के सर्वांगीण विकास में सहायक है । विद्यार्थी जो अपनी पढ़ाई के साथ खेलों को बराबर का महत्व देते हैं वे प्राय: कुशाग्र बुद्धि के होते हैं ।
विद्यार्थी जीवन में पढ़ाई के साथ – साथ खेलों का क्या महत्व है और खेल हमारे विद्यार्थी जीवन में किस हद तक लाभदायक है।
खेल प्रत्येक व्यक्ति के जीवन का एक हिस्सा है और यह उतना ही जरूरी है जितना शरीर के लिए भोजन। जिस प्रकार शरीर को नई ऊर्जा देने के लिए भोजन की जरूरत पड़ती है उतना ही ऊर्जा और ताजगी खेल शरीर को देते हैं। विद्यार्थी जीवन में मानसिक बोझ और शारीरिक थकान को हलका करने का एक साधन है तो वह है खेल और यह खेल हमारे शारीरिक क्रिया कलापों से जुड़े हो यह बेहद जरूरी है। क्यों कि आज यदि मनोरंजन की बात आती है तो केवल मोबाइल और कम्प्यूटर को मुख्य साधन माना जाता है जिनसे एक अकेला व्यक्ति भी अपना मनोरंजन कर सकता है। लेकिन यह मनोरंजन केवल हमारे दिमागी थकान को कुछ समय के लिए तो दूर कर देते हैं लेकिन इनसे हमें शरीर और मन में जो ऊर्जा मिलनी चाहिए थी वह नहीं मिल पाती है। आपने कभी गौर की हो तो कि जब हम मोबाइल या कम्प्यूटर पर लगातार ज्यादा समय तक लगें रहते हैं तो जैसे ही हम उनसे दूर होते हैं तो हमें कुछ अलग सा महसूस होता है और एक मायूसी सी घेर लेती है जिससे हमारा मन पढ़ाई में भी नहीं लग पाता इसका कारण यही होता है कि हमें अपने दिमाग और शरीर को भी नई ऊर्जा और स्फूर्ति की जरूरत पड़ती है और उसके लिए हमारे शरीर के क्रिया कलापों से जुड़े खेल बहुत जरूरी है । क्यों कि मोबाइल, कम्प्यूटर से हमारे शरीर को वह ताजगी नहीं मिल पाती है। इसलिए खेल हमारे सम्पूर्ण विकास का एक अहम हिस्सा है जिनसे हम अपने दिन भर की थकान को नई ऊर्जा में बदल सकते हैं। इतना ही नहीं खेल हमें अपने जीवन में कर्तव्यों और हमारे अंदरूनी हुनर को हमारे सामने रखते हैं जिनसे हमारे अंदर एक नया जोश नई उमंग पैदा होती है।
आज हम देखते हैं कि प्रत्येक विद्यार्थी अपनी पढ़ाई को लेकर एक मानसिक तनाव से गुजर रहा है इतना ही नहीं वह इस तनाव की वजह से स्वयं को ज्यादा समय तक पढ़ाई से जोड़ भी नहीं पाता है और एक किताबी कीड़ा बना रहता है, जिससे विद्यार्थी एक अलग सा ऊबाउपन महसूस करता है जिससे कि एक ही चीज़ को बार बार पढ़ लेने के बाद भी वह दिमाग में नहीं बैठ पाती है। तो इसका साफ कारण हमारी मानसिक थकान ही है। और उस थकान और तनाव को दूर करने के लिए हमें बहुत जरूरी है खेलों से जुड़े रहना। स्वयं के लिए समय का कुछ हिस्सा निकाला जाये जिससे हम अपना मनोरंजन कर सकें और मनोरंजन का मुख्य साधन शारीरिक गतिविधियों से संबंधित खेल ही हो।
Posted by Aman Gupta 6 years, 7 months ago
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Posted by Sarita Singh 6 years, 7 months ago
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Posted by Pardeep Kumar 6 years, 7 months ago
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Tarun Kumar 6 years, 6 months ago
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Posted by Hitashi Garg 6 years, 7 months ago
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Sohail Pasha 6 years, 7 months ago
Sia ? 6 years, 7 months ago
Akshit Thakur Singh 6 years, 7 months ago
Posted by Dinesh Sharma 6 years, 7 months ago
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Meghna Thapar 5 years, 10 months ago
Moat or pulley-system: It is a manual irrigation method. By this method water is directly taken out of wells with the help of pulley and is used to irrigate fields.
Posted by Naveen Jha 6 years, 7 months ago
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Prangya Pranab Routray Gudulu 6 years, 7 months ago
Posted by Rishi Singh 6 years, 7 months ago
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Meghna Thapar 5 years, 6 months ago
Metals in our body enable the healthy function of the brain and organs.
Metals are elements that are required for several purposes, such as the formation of blood, bones, teeth and other tissues; osmoregulation of body fluids, and the control of physicochemical processes. Some of these metals are only needed in trace amounts.
Macro Elements
- Calcium (Ca)
Structure of bone and teeth. Also plays a role in the growth of nerve cells. - Phosphorous (Ph)
Structure of bone and teeth. Required for ATP, the energy carrier in animals. - Magnesium (Mg)
Important in bone structure. Deficiency results in tetany (muscle spasms) and can lead to a calcium deficiency. - Sodium (Na)
Major electrolyte of blood and extracellular fluid. Required for maintenance of pH and osmotic balance. - Potassium (K)
Major electrolyte of blood and intracellular fluid. Required for maintenance of pH and osmotic balance. - Chlorine (Cl)
Major electrolyte of blood and extracellular and intracellular fluid. Required for maintenance of pH and osmotic balance. - Sulfur (S)
Element of the essential amino acids methionine and cysteine. Contained in the vitamins thiamin and biotin. As part of glutathione it is required for detoxification. Poor growth due to reduced protein synthesis and lower glutathione levels potentially increasing oxidative or xenobiotic damage are consequences of low sulfur and methionine and/or cysteine intake.
Micro Elements
- Iron (Fe)
Contained in hemoglobin and myoglobin which are required for oxygen transport in the body. Part of the cytochrome p450 family of enzymes. Anemia is the primary consequence of iron deficiency. Excess iron levels can enlarge the liver, may provoke diabetes and cardiac falurer. The genetic disease hemochromatosis results from excess iron absorption. Similar symptoms can be produced through excessive transfusions required for the treatment of other diseases. - Copper (Cu)
Contained in enzymes of the ferroxidase (ceruloplasmin?) system which regulates iron transport and facilitates release from storage. A structural element in the enzymes tyrosinase, cytochrome c oxidase, ascorbic acid oxidase, amine oxidases, and the antioxidant enzyme copper zinc superoxide dismutase. A copper deficiency can result in anemia from reduced ferroxidase function. Excess copper levels cause liver malfunction and are associated with genetic disorder Wilson’s Disease. - Manganese (Mn)
Major component of the mitochondrial antioxidant enzyme manganese superoxide dismutase. A manganese deficiency can lead to improper bone formation and reproductive disorders. An excess of manganese can lead to poor iron absorption. - Iodine (I)
Required for production of thyroxine which plays an important role in metabolic rate. Deficient or excessive iodine intake can cause goiter (an enlarged thyroid gland). - Zinc (Zn)
Important for reproductive function due to its use in FSH (follicle stimulating hormone) and LH (leutinizing hormone). Required for DNA binding of zinc finger proteins which regulate a variety of activities. A component of the enzymes alcohol dehydrogenase, lactic dehydrogenase carbonic anhydrase, ribonuclease, DNA Polymerase and the antioxidant copper zinc superoxide dismutase. An excess of zinc may cause anemia or reduced bone formation. - Selenium (Se)
Contained in the antioxidant enzyme glutathione peroxidase and heme oxidase. Deficiency results in oxidative membrane damage with different effects in different species. Human deficiency causes cardiomyopathy (heart damage) and is known as Keshan’s disease. - Fluorine (Fl)
Fluorine is essential for the maintenance of solidity of our bones. Fluorine can also protect us from dental decay - Cobalt (Co)
Contained in vitamin B12. An excess may cause cardiac failure. - Molybdenum (Mo)
Contained in the enzyme xanthine oxidase. Required for the excretion of nitrogen in uric acid in birds. An excess can cause diarrhea and growth reduction. - Chromium (Cr)
A cofactor in the regulation of sugar levels. Chromium deficiency may cause hyperglycemia (elevated blood sugar) and glucosuria (glucose in the urine).—
Posted by Sia Gupta 6 years, 7 months ago
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Posted by Lakshay Singh 6 years, 7 months ago
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Posted by Lakshay Singh 6 years, 7 months ago
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Tarun Kumar 6 years, 6 months ago
Posted by Hitashi Garg 6 years, 7 months ago
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Sia ? 6 years, 7 months ago
Minerals are mainly extracted by mining, drilling or quarrying.
Mining: The process of taking out minerals from rocks buried under the earth’s surface is called mining. Mining are of two types:
- Opencast mining: Open cast mining refers to the method of extraction in which minerals lying at shallow depths are taken out by removing the surface layer.
- Shaft mining: Shaft mining refers to the method of extraction in which deep bores called shafts, have to be made to reach mineral deposits that lie at great depths.
Drilling: Deep wells are bored to take minerals out, is called drilling.
Quarrying: In the process of quarrying, minerals that lie near the surface are simply dug out.
Posted by Atul Sinha 6 years, 7 months ago
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Posted by Bhumi Agarwal 6 years, 7 months ago
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Uday Kumar 6 years, 7 months ago
Posted by Mukesh Pandit 6 years, 7 months ago
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Posted by Mukesh Pandit 6 years, 7 months ago
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Yogita Ingle 6 years, 7 months ago
Rational number can be defined as any number which can be represented in the form of p/q where q is greater than 0. Also we can say that, any fraction fit under the category of rational numbers, where denominator and numerator are integers and the denominator is not equal to zero.
Rational numbers represented in the form of a/b, where b≠0 .
Posted by Vivek Kumar 6 years, 7 months ago
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Anurag Goyal 6 years, 7 months ago
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Sia ? 6 years, 7 months ago
The hermit lived in a wood which he never quitted, and he received none but common folk. So the king put on simple clothes and, before reaching the hermit’s cell, dismounted from his horse. Leaving his bodyguard behind, he went on alone.
Posted by Meer Aasif Meer 6 years, 7 months ago
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Posted by Hitashi Garg 6 years, 7 months ago
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Yogita Ingle 6 years, 7 months ago
(i) Seeds should be grown at proper depth.
(ii) They should be sown at a proper distance apart from each other.
(iii) Seed used for sowing should be clean, healthy and free from any disease or infection.
Posted by Pradeep Singh 6 years, 7 months ago
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