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<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-8619641663381907"      crossorigin="anonymous"></script> भौतिक विज्ञान :- विज्ञान की वह शाखा जिसके अन्तर्गत पदार्थ, ऊर्जा एवं उनकी पारस्परिक क्रियाओं का अध्ययन किया जाता है, भौतिक विज्ञान कहलाता है | रसायन विज्ञान :- इसके अन्तर्गत यांत्रिकी एवं द्रव के गुणों का अध्ययन किया जाता है, रसायन विज्ञान कहलाता है | आधुनिक भौतिकी:- इसके अन्तर्गत परमाणु एवं सूक्ष्म कणों का अध्ययन किया जाता है, आधुनिक भौतिकी कहलाता है | खगोलीय भौतिकी :- इसके अन्तर्गत ब्रह्मांड के विषय का अध्ययन किया जाता है, खगोलीय भौतिकी कहलाता है | We can understand about Science and its theories practically . When we study 📖 it's concept from deeply then we feel each things with meaning nature. 

 <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-8619641663381907"      crossorigin="anonymous"></script> A computer 🖥 is an electronic machine which stores, reads and processes data to produce meaningful information as output. Components of Computer:- Input Unit-   Devices used to give instructions, e.g., Keyboard, mouse, joystick, optical character reader, CDs, Bar code reader, Touch screen, Light Pen, Scanner, Magnetic Ink Character Recognition(MICR), etc. C entral Processing Unit-   (CPU) is the device for the manipulation of information inside the computer 🖥. CPU is known as the brain 🧠 of the computer, but commonly called a processor and has the following components. Arithmetic Logic Unit  -(ALU) performs all the logical and arithmetical operations. Control Unit - (CU) instructs, maintains and controls the flow of information. Output Unit:-  is the device to display the resu...

<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-8619641663381907"      crossorigin="anonymous"></script>   सौरमंडल  हमारा सौरमंडल मंदाकिनी आकाशगंगा मे स्थित है। अरूण और वरुण दो ग्रह सहोदर भाई के नाम से प्रसिद्ध हैं। उत्तरी ध्रुव 21 जून से 22 सितंबर तक हमेशा प्रकाश में रहता है । एक ग्रह की अपने कक्ष में सूर्य से अधिकतम दूरी को अपसौर तथा न्यूनतम दूरी को उपसौर कहा जाता है । 22 दिसंबर को दक्षिणी गोलार्द्ध में सबसे बड़ा दिन होता है।  

<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-8619641663381907"      crossorigin="anonymous"></script> PRE-HISTORIC PERIOD :- Paleolithic Period: - Homo sapiens first appeared towards the end of this phase. In this period, man barely managed to gather his food and subsisted on hunting. Quartzite is the first stone made tools of this phase.  Paleolithic Period is divided into 3 main phases. They are told as following:- 1. Lower Paleolithic Period  2. Middle Paleolithic Period 3. Upper Paleolithic  Period  Mesolithic Period :- This period tells about Domestication of Animals was started some characteristic tools were used that time, called as " microliths ". Bhimbetka in Madhya Pradesh, is known for ancient caves depicting pictures of birds 🐦, animals and humans. Neolithic Period:-  Neolithic people knew about fire 🔥 and  wheel 🛞 . An important site of this period is ' Burzahom'...

<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-8619641663381907"      crossorigin="anonymous"></script>   " ENVIRONMENT":- All external conditions, factors, matter and energy living and non living that affect any living organism or other specified system. " ECOLOGY":- Biological science that studies the relationships between living organism and their environment; study of the structure and functions of the nature. "OZONE LAYER[ O 3]" Colorless and highly reactive gas and a major component of photochemical smog. Also found in the OZONE LAYER in the atmosphere and protect us from ultraviolet rays of the Sun 🌞.  

<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-8619641663381907"      crossorigin="anonymous"></script> UNIVERSE :- The study of UNIVERSE is known as " Cosmology". The universe is commonly defined as the totality of everything that exists including all physical matter and energy, the palnets, stars, galaxies and contents of intergalactic space. SOLAR SYSTEM :- The solar system consists of the Sun, Eight planets and their satellites (or moons 🌙) and thousands of other smaller heavenly bodies such as asteroids, comets and meteors. The Sun is at the centre of the solar system all these bodies revolve around it. It is the nearest star to the earth There are Eight planets which are discussed as follows:-         1. Mercury 2. Venus 3. Earth 4. Mars 5. Jupiter 6. Saturn 7. Uranus 8. Neptune  Thus we can see that our eight planets in our solar system which exists in the UNIVERSE and Sun is the...