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Similar to oceanography: waterland, oceans and water, composition of ocean water
oceanography: waterland, oceans and water, composition of ocean water
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- 3. Some basic info.about oceanography • Founder of Oceanography is unknown. • Can also referred as “oceanology” and “marine science”. • In short, oceanography is a science that deals with the ocean. • It is a science that deals with the oceans and includes the delimitation of their extent and depth, the physics and chemistry of their waters, marine biology, and the exploitation of their resources.
- 4. World land andwater bodies
- 5. World land andwater bodies • Earth is referred as “Blue planet” of the galaxy. • 71 percent of the Earth's surface is covered with water (known as ocean, Sea, rivers, ponds, lakes, etc.) • the land has its contribution of 29% (including islands, continents, etc.)
- 6. Earth land • referredas dry land • support agriculture, habitat, and various natural resources
- 7. Water bodies • anysignificant accumulation of water, generally on a planet's surface. • often refers to oceans, seas, and lakes • Most are naturally occurring geographical features (e.g, ocean,sea,river etc) • some are artificial (e.g, canal, ponds, lakes etc)
- 9. Origin of theocean
- 10. Origin of theocean - Earth is about 4.5 billion years old but oceans are 3.8 billion years old. Main theories describing how oceans are created:- 1: Earth was formed with water and that this water come from the inside out 2: Earth was dry planet with brought here by other sources via meteorite impacts
- 11. Formation of oceangoes from 3 phases -initially there was only water vapor in atmosphere -Air and ground surface too hot for liquid -Cooling of atmosphere led to condensation and rain -Ground surface still too hot for pooling -Further cooling of the ground surface finally led to accumulation of liquid water on surface
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- 23. Name of theocean • there are 5 oceans. These are – 1. Pacific ocean 2. Indian ocean 3. Atlantic ocean 4. Arctic ocean 5. Antarctic ocean
- 24. Pacific ocean • Namewas coined by Portuguese explorer fardinand magellan • Came from “mar pacifico” means peaceful sea • Largest ocean • Covers one-third of the earth surface • Area 161.2×106 km2 • Mean depth 4280 meters • The deepest point Mariana trench • Equator subdivides into north Pacific Ocean and South Pacific Ocean
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- 26. Atlantic ocean • 2ndlargest ocean • area 106.5×106 km2 • Atlantis thalassa 'the Atlantis sea’ where the name refers to "the sea beyond the pillars of Heracles" which is said to be part of the ocean that surrounds all land. • the Age of Discovery, the Atlantic was also known to English cartographers as the Great Western basin • Mean depth 3646 m where maximum depth 8486m • S-shaped basin extending longitudinally between Eurasia and Africa to the east, and the Americas to the west
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- 28. Indian ocean • Thirdlargest ocean • Named after india • known as Ratnākara • Area 7.056×106km2 • bounded by Asia on the north, on the west by Africa, on the east by Australia, and on the south by the Southern Ocean • Mean depth is 3,741 m and maximum depth is 7906 m
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- 30. Southern ocean • Knownas the Antarctic ocean or the austral ocean • Generally taken to the 60˚S latitude • Fourth largest ocean • Southern Ocean encompasses the South Pole. • Average depth 3962 meters to 4999 meters • Deepest part is south sandwich trench that is 7235 meters • home to 90% of the world's ice. • the windiest, driest and coldest continent in the world. • area 20.33×106 sq. km.
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- 32. Arctic ocean • Someoceanographers call it the Arctic Mediterranean Sea, classifying it a mediterranean sea or an estuary of the Atlantic Ocean • Smallest and shallowest ocean of the world • Also called Arctic Mediterranean sea • Located ate mostly in the northern hemisphere • Area 14×106 sq. km • Mean depth 1038m • salinity is the lowest on average of the five major oceans
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- 34. Composition of oceanwater
- 35. Components of oceanwater Manly divided into two types: 1)Water 2) Salts The other components are:- • Solids • Colloids • Dissolved solutes • gases
- 37. Quantity of componentsin 1kilogram sea water
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- 41. water • transparent andnearly colorless chemical substance. • main constituent of Earth's streams, lakes, and oceans. • fluids of most living organisms. • chemical formula is H2O.