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  2. Earth - Wikipedia

    en.wikipedia.org/wiki/Earth

    Earth's surface topography comprises both the topography of the ocean surface, and the shape of Earth's land surface. The submarine terrain of the ocean floor has an average bathymetric depth of 4 km, and is as varied as the terrain above sea level.

  3. Square kilometre - Wikipedia

    en.wikipedia.org/wiki/Square_kilometre

    The square kilometre (square kilometer in American spelling; symbol: km 2) is a multiple of the square metre, the SI unit of area or surface area. 1 km 2 is equal to: 1,000,000 square metres (m 2) 100 hectares (ha) It is also approximately equal to: 0.3861 square miles [2] 247.1 acres [3] Conversely: 1 m 2 = 0.000001 (10 −6) km 2; 1 hectare ...

  4. Orders of magnitude (area) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(area)

    Surface area of the brown dwarf CT Chamaeleontis B. 460,000 Mm 2: Area swept by the Moon's orbit of Earth 10 18: 1 square gigametre (Gm 2) 6.1 Gm 2: Surface area of the Sun [94] 10 19 30 Gm 2: Surface area of the star Vega: 10 20 100 Gm 2 10 21: 1 zetta square meter Z(m 2) 1 000 Gm 2: 10 22 11 000 Gm 2: Area swept by Mercury's orbit around the ...

  5. List of countries and dependencies by area - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_and...

    Dymaxion map of the world with the 30 largest countries and territories by area. This is a list of the world's countries and their dependencies, ranked by total area, including land and water. This list includes entries that are not limited to those in the ISO 3166-1 standard, which covers sovereign states and dependent territories.

  6. Asia - Wikipedia

    en.wikipedia.org/wiki/Asia

    Asia (/ ˈ eɪ ʒ ə / ⓘ AY-zhə, UK also / ˈ eɪ ʃ ə / AY-shə) is the largest continent [note 1] [10] [11] in the world by both land area and population. [11] It covers an area of more than 44 million square kilometres, [note 2] about 30% of Earth's total land area and 8% of Earth's total surface area.

  7. List of political and geographic subdivisions by total area ...

    en.wikipedia.org/wiki/List_of_political_and...

    Largest of the eight biogeographic realms of the Earth. Eurasia: 53,990,000: Largest broadly connected contiguous landmass, comprising the traditional continents of Europe and Asia; sometimes considered a single continent, it covers 10.6% of Earth's surface (36.2% of the land area). Asia Cooperation Dialogue: 46,872,864: Supranational political ...

  8. List of countries and dependencies by population density

    en.wikipedia.org/wiki/List_of_countries_and...

    List of countries and dependencies showing population densities, populations, and areas Location Pop. /km 2 Pop. /sq mi Population Area (km 2) Area (sq mi) Notes

  9. Land - Wikipedia

    en.wikipedia.org/wiki/Land

    Land is often defined as the solid, dry surface of Earth. [1] The word land may also collectively refer the collective natural resources of Earth, [2] including its land cover, rivers, shallow lakes, its biosphere, the lowest layer of the atmosphere (troposphere), groundwater reserves, and the physical results of human activity on land, such as architecture and agriculture. [3]