The pacific is twice as large as any other body of

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The pacific is twice as large as any other body of water on Earth. Its total area is one-third of the total area of Earth, more than the world’s entire land surface combined. It has the greatest average depth of any ocean and also the deepest known trenches. It ranges from the Antarctic Circle in the South to almost the Artic Circle in the north, but it is still mostly a tropical ocean. 6. Why does salinity vary in different parts of the world ocean? There are parts of the ocean where hardly any rain falls but warm dry winds cause lots of evaporation. This evaporation removes water – when water vapor rises into the atmosphere, it leaves the salt behind, so the salinity of the seawater increases. This causes the seawater to become denser. 7. Why are the oceans becoming slightly more acidic? As the amount of carbon dioxide in the atmosphere rises, the oceans absorb a lot of it. In the ocean, carbon dioxide reacts with seawater to form carbonic acid. This causes the acidity of seawater to increase. Movement of Ocean Waters 8. Why do most oceanic areas experience two high tides and two low tides each day? The gravitational pull of the moon rising and falling twice a day. 9. What is meant by tidal range ? Vertical differences in elevation between the high and the low.
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10. Distinguish between flood tide and ebb tide . Flood tide: movement of water to the coast. Ebb tide: gradual movement of water away from the coast. 11. Describe and explain spring tides and neap tides .
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