Big Bang Theory The Big Bang is the most acceptable answer to how the universe began. According to this theory, the universe came into existence around 13.8 billion years ago. It started as a single point called “singularity.” Singularity is infinite mass with zero volume; therefore, it has infinite density. Thus, the universe began as …
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UPSC Prelims News of 5 January 2023 Rise in Silent Valley Bird Species Context: Survey of birds in Silent Valley National Park has identified 141 species, of which 17 were new. With this, a total of 175 species of birds have been spotted in Silent Valley. Silent Valley National Park: Location: It is located …
Ocean Currents A continuous general movement of ocean water in a specified direction is called an ocean current. These can be considered as a river running across the surface of the ocean. Most surface currents carry water horizontally and vertically in the upper layer above the thermocline (you will learn about this later in this …
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Ocean Waves Ocean Waves: An Ocean wave is a ridge or a swell on the surface of a body of water. They are oscillatory surface water movements resulting in the rise and fall of surface water. Waves are the horizontal movements of ocean water. They are the energy that moves across the ocean surface, not …
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Ocean Tides Ocean Tides: Seawater is not stationary but rises and falls twice a day at constant intervals. This periodical rise and fall of the sea level, once or twice a day, is called a tide. Twice a day, about every 12 hours and 26 minutes, the sea level rises, and it falls twice a …
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Air Masses Air Masses: A large volume of air in the atmosphere that is mostly uniform in temperature and moisture is referred to as air mass. Air masses can travel thousands of kilometres in any direction and can reach the stratosphere—16 kilometres (10 miles) into the atmosphere. Air mass was a concept developed during World …
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Later Mughal Introduction Read all about the Later Mughals.The rebirth of regional identities during the time between approximately 1707 CE and around 1761 CE (from Aurangzeb’s death to the time of the Third Battle of Panipat, where Ahmad Shah Abdali defeated the Maratha chiefs) revealed a sad state of affairs for the once-powerful Mughals. The …
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Cloud A cloud is a suspension of ice crystals and microscopic water droplets in the earth’s atmosphere. They are extremely dense and voluminous masses that appear to the unaided eye. Their size, shape, or colour distinguishes them from one another. Because they are the brightest objects in the visible region of the solar spectrum, they …
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Decline of Mughal Empire Read all about Decline of Mughal Empire. The Successor States emerged in its stead after the Mughal Empire disintegrated in the 1750s. The Mughals enjoyed direct rule over nearly all of India until 1707. When Aurangzeb passed away in 1707 CE, the Mughal Empire swiftly started to disintegrate. The Great Mughals’ …
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Plate Tectonics Plate Tectonics: A uniform framework for comprehending mountain-building processes, volcanic eruptions, earthquakes, the evolution of the Earth’s surface, and reconstructing the planet’s former continents and oceans was provided by the plate tectonics theory, which deals with the dynamics of the lithosphere, the outer shell of the planet. The idea of tectonic plates was …
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