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The hydrosphere (from Ancient Greek ὕδωρ (húdōr) 'water' and σφαῖρα (sphaîra) 'sphere') [1] [2] is the combined mass of water found on, under, and above the surface of a planet, minor planet, or natural satellite. Although Earth's hydrosphere has been around for about 4 billion years, [3] [4] it continues to
World War II [b] or the Second World War (1 September 1939 – 2 September 1945) was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all the world's countries—including all the great powers—participated, with many investing all available economic, industrial, and scientific capabilities in pursuit of total war, blurring the distinction between military and ...
The five components of the climate system all interact. They are the atmosphere, the hydrosphere, the cryosphere, the lithosphere and the biosphere. [1]: 1451 Earth's climate system is a complex system with five interacting components: the atmosphere (air), the hydrosphere (water), the cryosphere (ice and permafrost), the lithosphere (earth's upper rocky layer) and the biosphere (living things).
The Earth's atmosphere, hydrosphere, and biosphere together hold less than 0.05% of the Earth's total mass of oxygen. Besides O 2, additional oxygen atoms are present in various forms spread throughout the surface reservoirs in the molecules of biomass, H 2 O, CO 2, HNO 3, NO, NO 2, CO, H 2 O 2, O 3, SO 2, H 2 SO 4, MgO, CaO, Al2O3, SiO 2, and ...
Seven countries, an ocean and over a thousand miles stand between them and their dreams for a future
The ocean plays a key role in the water cycle as it is the source of 86% of global evaporation. [2] The water cycle involves the exchange of energy, which leads to temperature changes. When water evaporates, it takes up energy from its surroundings and cools the environment. When it condenses, it releases energy and warms the environment.
Cemetery 117: site of the world's first known battle/war. c.12,500 BC: c.10,800 BC: Natufian culture begins minor agriculture c. 12,150 BC c. 11,140 BC Mesolithic 2 (Natufian culture), some sources have Mesolithic 2 ending at 9500 BC c. 12,000 BC c. 11,700 BC Older Dryas stadial (cool period) c. 11,700 BC c. 10,800 BC Allerød oscillation: c ...
The Ancient History Encyclopedia was founded in 2009 by van der Crabben with the stated goal of improving history education worldwide by creating a freely accessible and reliable history source. [1] The nonprofit organization is based in Godalming, United Kingdom and Montreal, Canada, although it has no office and its team is globally distributed.