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  2. Tropics - Wikipedia

    en.wikipedia.org/wiki/Tropics

    The northern one is called the Tropic of Cancer, and the southern is the Tropic of Capricorn. As the Earth's axial tilt changes [a], so too do the tropical and polar circles. The tropics constitute 39.8% of Earth's surface area [1] and contain 36% of Earth's landmass. [2]

  3. Tropic of Cancer - Wikipedia

    en.wikipedia.org/wiki/Tropic_of_Cancer

    The Tropic of Cancer's position is not fixed, but constantly changes because of a slight wobble in the Earth's longitudinal alignment relative to the ecliptic, the plane in which the Earth orbits around the Sun. Earth's axial tilt varies over a 41,000-year period from about 22.1 to 24.5 degrees, and as of 2000 is about 23.4 degrees, which will ...

  4. Tropical climate - Wikipedia

    en.wikipedia.org/wiki/Tropical_climate

    Tropical climate. Tropical savanna climate (Dry summer: As, dry winter: Aw). Tropical climate is the first of the five major climate groups in the Köppen climate classification identified with the letter A. Tropical climates are defined by a monthly average temperature of 18 °C (64 °F) or higher in the coolest month, featuring hot ...

  5. Tropical rainforest - Wikipedia

    en.wikipedia.org/wiki/Tropical_rainforest

    Tropical rainforests are hot and wet. Mean monthly temperatures exceed 18 °C (64 °F) during all months of the year. [4] Average annual rainfall is no less than 1,680 mm (66 in) and can exceed 10 m (390 in) although it typically lies between 1,750 mm (69 in) and 3,000 mm (120 in). [5]

  6. Tropical rain belt - Wikipedia

    en.wikipedia.org/wiki/Tropical_rain_belt

    Tropical rain belt. Rainfall and the tropical climate dominate the tropical rain belt, which oscillates from the northern to the southern tropics over the course of the year, roughly following the solar equator. The tropical rain belt is an area of active rain that is positioned mostly around the tropics. [1]

  7. ACTH Test - WebMD

    www.webmd.com/a-to-z-guides/acth-test

    An ACTH test is a type of blood test. It measures how much of a hormone you have called ACTH (adrenocorticotropic hormone). This test should not be confused with an ACTH stimulation test. Other ...

  8. Tropic of Capricorn - Wikipedia

    en.wikipedia.org/wiki/Tropic_of_Capricorn

    The Northern Hemisphere equivalent of the Tropic of Capricorn is the Tropic of Cancer. The Tropic of Capricorn's position is not fixed, but constantly changes because of a slight wobble in the Earth's longitudinal alignment relative to its orbit around the Sun. Earth's axial tilt varies over a 41,000 year period from about 22.1 to 24.5 degrees ...

  9. Dry season - Wikipedia

    en.wikipedia.org/wiki/Dry_season

    t. e. The dry season is a yearly period of low rainfall, especially in the tropics. The weather in the tropics is dominated by the tropical rain belt, which moves from the northern to the southern tropics and back over the course of the year. The temperate counterpart to the tropical dry season is summer or winter.