World & Physical Geography MCQs

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The sun accounts for approximately 99.86% of the total mass of the solar system. The remaining 0.14% is made up of the planets and their moons, as well as asteroids, comets, and other small bodies. The sun is an enormous, luminous ball of gas that is the dominant gravitational force in the solar system. It is made up of mostly hydrogen and helium, and is so massive that the gravitational pull of its own mass keeps it from collapsing under its own weight. The sun is the primary source of light and heat for the solar system and plays a vital role in the formation and evolution of the planets and other bodies that orbit around it.

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The iron makes up about 34.6% of Earth’s mass and 5.2% of Earth’s crust. The other metals there are aluminium, silicon etc. The abundant metal Iron is truly one of Earth’s essential building blocks.

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The Moon is an astronomical body orbiting Earth. It is the fifth-largest satellite in the Solar System. It also has an estimated mass of 7.342 × 1022 kg and an escape velocity is 2.38 km/s.

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The Arctic Circle is an imaginary line around the arctic. It’s defined as the latitude above which the sun does not set on the day of the summer solstice and never rises during the December Solstice. This is because the arctic and Antarctic circle have sunlight for 6 months continuously.

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The term “cosmic rays” was coined by the Austrian physicist Victor Francis Hess in 1912. Hess was awarded the Nobel Prize in Physics in 1936 for his discovery of cosmic rays.

Cosmic rays are high-energy particles that travel through space and reach the Earth’s atmosphere. They are believed to be made up of protons, electrons, and atomic nuclei, and they can have energies that are millions or billions of times greater than those of particles produced by particle accelerators on Earth.

Hess discovered cosmic rays while conducting experiments in which he flew high-altitude balloon flights to measure the radiation levels at different altitudes. He found that the radiation levels increased with altitude, leading him to conclude that the radiation was coming from outer space and not from the Earth’s surface. He named these high-energy particles “cosmic rays” because they seemed to be coming from the cosmos.

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The gulf of Thailand Borders Cambodia from the south. The Gulf of Thailand, also known as the Gulf of Siam, is a shallow northwesternly inlet in southwestern South China Sea.It is bounded between the southwestern shores of the Indochinese Peninsula and the northern half of the Malay Peninsula.

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The Float at Marina Bay in Singapore was built in 2007. It is the largest floating stage in the world. It is also as football stadium.

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The Amazon is the largest river by basin size, followed by the Congo and then the Mississippi. The Amazon has a basin size of approximately 6.7 million square kilometers, while the Congo has a basin size of approximately 4 million square kilometers and the Mississippi has a basin size of approximately 3 million square kilometers.

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The region consists of Indo-Burman ranges (IBR; Arakan Yoma, Chin Hills and Naga Hills, from south to north), the Myanmar Central Basin (MCB) and the eastern highlands of Shan plateau. IBR is an arcuate sedimentary belt with N–S trend of folded mountain chain, formed by Cenozoic rocks with Triassic metamorphic basement. It is considered as an active accretionary wedge linked to eastward subduction of the Bengal basin oceanic crust. The zone is marked by high seismicity, high erosion, high uplift and exhumation rates6. Due to the complex nature, geodynamic setting, plate motion and other geodynamic processes in the region are largely unknown. The region has gained attention for the plate motion and earthquake occurrence process. The construction in the area is largely traditional. There are no high rises buildings, houses are flatter. The region is sparsely populated.

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Around the year 2000, Earth’s spin axis took an abrupt turn toward the east and is now drifting almost twice as fast as before, at a rate of almost 7 inches (17 centimetres) a year. Scientists have suggested that the loss of mass from Greenland and Antarctica’s rapidly melting ice sheet could be causing the eastward shift of the spin axis. All these cause changes in the movement of water and accumulation of mass on poles. Earth wobbling affects the results obtained from GPS, and other Earth-Observation satellites.