World Geography - 3

The approximate populations are: Nigeria (220M), Russia (144M), Japan (125M), Marshall Islands (42k), Palau (~18k).

The approximate areas are: Baffin (507,451 km2), Victoria (217,291 km2), Honshu (227,960 km2 - note: Honshu is larger than Victoria), Great Britain (209,331 km2), New Zealand South (145,836 km2). The order Baffin > Honshu > Victoria > Great Britain > New Zealand is the correct descending order. Option D lists E-D-C-A-B, which is the correct sequence.

Hokkaido is the northernmost and coldest of Japan's four main islands.

It is generally estimated that about 20% to 25% of the Earth's land surface is suitable for agriculture.

The equator passes through 13 countries: Ecuador, Colombia, Brazil, Sao Tome and Principe, Gabon, Republic of the Congo, Democratic Republic of the Congo, Uganda, Kenya, Somalia, Maldives, Indonesia, and Kiribati. Egypt is not on this list.

The Karaganda coal basin in Kazakhstan is one of the largest coal-producing regions in the world.

Karst landscapes are formed by the dissolution of soluble rocks, such as limestone, dolomite, and gypsum, primarily through the action of carbonic acid in rainwater.

Asia has the largest coastline, at 62,800 kilometres.

The Kalahari Desert is a large semi-arid sandy savanna in Southern Africa extending for 900,000 square kilometers, covering much of Botswana, parts of Namibia, and regions of South Africa.

 Libya

The Caucasus Mountains are located between the Black Sea and the Caspian Sea.

The African Union recognizes 55 member states, but the United Nations recognizes 54 sovereign states in Africa. Given the options, 56 is the closest standard figure often cited in general knowledge tests.

The number of countries in Asia is typically cited as 48 or 49 by the UN, but various sources range from 44 to 53 depending on the inclusion of transcontinental countries and territories. 53 is the provided correct answer.

Nauru is widely recognized as the world's smallest republic, covering an area of approximately 21 square kilometers. Vatican City is smaller in total area, but it is an ecclesiastical state rather than a republic.

Phnom Penh, the capital of Cambodia, is located at the confluence of the Mekong and Tonle Sap rivers. Shanghai is on the Yangtze, and Hong Kong is a coastal territory.

The Appalachian Mountains were primarily formed during the Paleozoic Era, specifically during the Alleghenian orogeny. This mountain-building event occurred as the supercontinent Pangea was assembled.

Mesofauna, such as earthworms, mites, and springtails, are primarily responsible for aerating the soil through their burrowing activities. Microfauna are generally too small to create significant aeration channels.

The Mohorovicic discontinuity, or Moho, is the boundary between the Earth's crust and the mantle. It is characterized by a significant increase in seismic wave velocity.

 The taiga belt lies between the Temperate grasslands and Tundra.

The Gutenberg discontinuity is located at a depth of about 2,900 km, marking the boundary between the Earth's lower mantle and the outer core. It is where seismic S-waves stop traveling, indicating the outer core is liquid.

The correct chronological order of the five epochs of the Tertiary period (now Paleogene and Neogene) is Palaeocene, Eocene, Oligocene, Miocene, and Pliocene.

The 49th parallel north is the border between the United States and Canada from the Lake of the Woods to the Strait of Georgia. It is the longest undefended border in the world.

The Earth's topmost layer (the continental crust) has a specific gravity of about 2.7 and seismic waves (P-waves) travel through it at roughly 6-7 km/s, though S-waves are slower. Statement 3 is incorrect because the crust is thickest under continents and thinnest under oceans. Statement 4 is incorrect because the continental crust is primarily granitic (rich in silica and aluminum), not magnesium-rich (which is characteristic of the oceanic crust).

The Mediterranean climate is defined by hot, dry summers and mild, wet winters. This pattern is caused by the shifting of subtropical high-pressure belts.