World & Physical Geography MCQs

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Earth is the third planet from the Sun and the only astronomical object known to harbor life. Its density is 5.515 g/cm3.

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Ossetia is an ethnolinguistic region located on both sides of the Greater Caucasus Mountains. It is inhabited by the Ossetians and the Ossetian language is part of the Eastern Iranian branch of the Indo-European languages family. It is a point of contention between Russia and Georgia.

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The Mohorovicic Discontinuity, or “Moho,” is the boundary between the crust and the mantle. Guttenberg is between Mantle and outer core, Lehman is between outer core and inner core.

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Radiation from Sun comes to earth in the form of smaller waves and earth being cooler body, gives off energy in the form of long-wave. These are then radiated back to the atmosphere. This this Long-Wave Radiation from the earth’s surfaces heats the lower layers of the atmosphere. The Atmospheric conduction occurs at the interface of (zone of contact between) the atmosphere and the earth’s surface. However, it is actually a minor method of heat transfer in terms of warming the atmosphere since it affects only the layers of air closest to the earth’s surface. This is because air is a very poor conductor of heat. ‘ When the pockets of air near the surface are heated, they expand in volume, become less dense than the surrounding air, and therefore rise. This vertical transfer of heat through the atmosphere is called convection, and is the same type of process by which heated water circulates in a pan while heating. The currents set into motion by the heating of a fluid (liquid or gas) make up a convectional system. Most vertical transfer of heat within the atmosphere & Oceans occurs via Convection and is a major cause of clouds and precipitation.

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The salinity of Red Sea is greater than the world average, approximately 4 percent. It has been also cited as most saline open sea due to high rate of evaporation and very little precipitation, Lack of significant rivers or streams draining into the sea and limited connection with the Indian Ocean, which has lower water salinity.

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Sandstone is a clastic sedimentary rock composed mainly of sand-sized mineral particles or rock fragments. Most sandstone is composed of quartz or feldspar because they are the most resistant minerals to weathering processes at the Earth’s surface, as seen in Bowen’s reaction series.

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Jupiter revolves or orbits around the Sun once every 11.86 Earth years, or once every 4,330.6 Earth days. Jupiter travels at an average speed of 29,236 miles per hour or 47,051 kilometers per hour in its orbit around the Sun.

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Tidal currents occur in conjunction with the rise and fall of the tide. The vertical motion of the tides near the shore causes the water to move horizontally, creating currents. When a tidal current moves toward the land and away from the sea, it “floods.”

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Lord Howe Island is located in the Pacific Ocean and it is the most southern coral reef ecosystem of the world. It is also a World Heritage Site, situated to the northeast of Australia.

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Sumatra is the largest island of Indonesia. It is located in the Indian Ocean. Sumatra is the sixth largest island in the world and one of the major islands of the Sunda group of islands.