World & Physical Geography MCQs

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The main criteria of dividing major natural regions of the world are Temperature, rainfall and vegetation. They play a major role as they vary with the latitude and they became the main criteria.

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Harmattan wind is known as the Doctor wind. It is a dry, dusty, north-easterly or easterly wind that blows in West Africa north of the equator. The Harmattan wind blows from the Sahara Desert over West Africa into the Gulf of Guinea. It is called Doctor Wind because its dryness kills pests and germs.
The Harmattan wind brings desert-like weather conditions. It lowers the humidity, dissipates cloud cover, and prevents rainfall formation. It can also create big clouds of dust which can result in dust storms or sandstorms. The Harmattan wind can have health effects on people, including Dryness of the skin; Dried or chapped lips; Eyes; Respiratory problems.

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The correct answer is the Proton Proton Chain Reaction. This process occurs in stars like the Sun, where hydrogen nuclei (protons) fuse to form helium, releasing energy. It is the dominant energy production mechanism in stars with masses similar to or smaller than the Sun. The CNO cycle, on the other hand, is more prevalent in larger stars. The proton-proton chain reaction is responsible for about 99% of the Sun’s energy output.

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Greenland is the world’s largest island. It located between the Arctic and Atlantic oceans, east of the Canadian Arctic Archipelago. is known as Kalaallit Nunaat, meaning “Land of the people”.

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The correct reason for sprinkling salt on icy roads is that “the salt lowers the freezing point of water.” This process is known as freezing point depression. When salt (sodium chloride) is added to ice, it disrupts the formation of ice crystals, causing the ice to melt at lower temperatures. This is why salt is commonly used in winter road maintenance. it helps to keep roads safer by preventing ice formation. In fact, salt can lower the freezing point of water to about -9.5°C (15°F) when used in sufficient quantities.

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The moon has a significant impact on tides, due to the gravitational attraction of the moon on the Earth’s water. This effect is magnified when the moon’s gravitational attraction aligns with the gravitational pull of the sun. This produces the highest high tides and lowest low tides, known as spring tides. When the pull of the moon and the sun are perpendicular to each other, the lowest high tides and highest low tides, collectively termed neap tides, are produced. While ocean currents are primarily affected by winds and the Coriolis force, tides can have a large impact on currents near the coasts.

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An electrojet is a streaming movement of charged particles in the lower ionosphere. Ionosphere is a region of Earth's upper atmosphere, extending from about 60 km to 1,000 km altitude. Electrojets are mainly found at altitudes between 100 to 150 km.

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High tides and low tides are caused by the moon. The moon’s gravitational pull generates something called the tidal force. The tidal force causes Earth and its water to bulge out on the side closest to the moon and the side farthest from the moon. When you’re not in one of the bulges, you experience a low tide.

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Mediterranean climate. Mediterranean climate is major climate type of the Koppen classification characterized by hot, dry summers and cool, wet winters and located between about 30° and 45° latitude north and south of the Equator and on the western sides of the continents.

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For humans, population density is the number of people per unit of area, usually quoted per square kilometer or square mile. Commonly this may be calculated for a county, city, country, another territory or the entire world.