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Std.7 sst ch.1 question answer

2 . If the Himalayas did not exist     If the Himalayas did not exist, India would be very different. The cold winds from Central Asia would enter India freely, making the climate much colder and drier. Many rivers like the Ganga, Yamuna, and Brahmaputra might not exist because these rivers originate from the Himalayan glaciers. Without the Himalayas, there would be less rainfall, fewer forests, and farming would become difficult in many regions. The northern plains might even look like deserts. The Himalayas also protect India from strong winds and help in bringing monsoon rains, so life in India would be much harder without them. 3. Why is India called a ‘mini-continent’? India is called a “mini-continent” because it has great diversity in physical features, climate, culture, languages, and natural resources, just like a continent. It has mountains in the north, deserts in the west, plains in the center, plateaus in the south, and coastal regions on both sides. Different par...
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Facebook

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Facebook   Facebook  is an American online  social media  and  social networking service  owned by  Meta Platforms . Founded in 2004 by  Mark Zuckerberg  with fellow  Harvard College  students and roommates  Eduardo Saverin ,  Andrew McCollum ,  Dustin Moskovitz , and  Chris Hughes , its name comes from the  face book  directories often given to American university students. Membership was initially limited to Harvard students, gradually expanding to other North American universities and, since 2006, anyone over 13 years old. As of 2020, Facebook claimed 2.8 billion monthly active users,  and ranked seventh in global internet usage.  It was the most downloaded  mobile app  of the 2010s. Facebook can be accessed from devices with Internet connectivity, such as personal computers, tablets and smartphones. After registering, users can create a profile ...
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Atomic bombings of Hiroshima and Nagasaki

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Atomic bombings of Hiroshima and Nagasaki   The United States detonated two  nuclear weapons  over the Japanese cities of  Hiroshima  and  Nagasaki  on 6 and 9 August 1945, respectively. The two bombings killed between 129,000 and 226,000 people, most of whom were civilians, and remain the only use of nuclear weapons in armed conflict. In the final year of World War II, the Allies prepared for a costly invasion of the Japanese mainland. This undertaking was preceded by a conventional and firebombing campaign that devastated 67 Japanese cities. The war in Europe concluded when Germany surrendered on 8 May 1945, and the Allies turned their full attention to the Pacific War. By July 1945, the Allies' Manhattan Project had produced two types of atomic bombs: "Fat Man", a plutonium implosion-type nuclear weapon; and "Little Boy", an enriched uranium gun-type fission weapon....
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Galaxy

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Galaxy   A  galaxy  is a  gravitationally  bound system of  stars ,  stellar remnants ,  interstellar gas ,  dust , and  dark matter .  The word is derived from the  Greek   galaxias  ( γαλαξίας ), literally "milky", a reference to the  Milky Way . Galaxies range in size from  dwarfs  with just a few hundred million (10 8 ) stars to  giants  with one hundred  trillion  (10 14 ) stars,  each orbiting its galaxy's  center of mass . Galaxies are categorized according to their visual  morphology  as  elliptical ,   spiral , or  irregular .  Many are thought to have  supermassive black holes  at their centers. The Milky Way's central black hole, known as  Sagittarius A* , has a mass four million times greater than the  Sun .  As of March 2016,  GN-z11  is the oldest and most distant galaxy observed. It has a  ...
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