BIOMES OF THE EARTH - OCEANS Phần 4 pps

... fraction of the wind speed. The fastest major surface currents in the world, the Gulf Stream of the North Atlantic and the Kuroshio Current of the North Pacific, flow at speeds of only 2.5 4. 5 mph (4 7 ... others, causes the atmosphere to circulate over the planet’s surface. The Tropics (that part of Earth s surface lying between the tropic of Cancer in t...

Ngày tải lên: 05/08/2014, 14:20

... boundary of the Southern Ocean is a feature called the Antarctic GEOGRAPHY OF THE OCEANS 21 thousand). In addition, the Baltic Sea, unlike the North Sea, is separated from the warming effect of the ... than the Atlantic’s average of 35 parts per 20 OCEANS GEOLOGY OF THE OCEANS 31 calculate Earth s likely temperature 1,865 miles (3,000 km) beneath the surfa...

Ngày tải lên: 05/08/2014, 14:20

... prop- erly rather than simply suck or filter. By 250 million years ago 30-foot (9-m)-long sharks were traveling the seas, biting into other fish with their powerful jaws. 1 14 OCEANS BIOLOGY OF THE ... with a central cavity for digesting food, and they cap- ture prey using stinging tentacles. The 30-foot (9-m)-long tentacles of the Portuguese man -of- war jellyfish carry enough...

Ngày tải lên: 05/08/2014, 14:20

... association with people. The gull-like jaegars and skuas are pirates among seabirds. They 1 24 OCEANS ECOLOGY OF THE OCEANS 143 the sandy shore, the meiofauna includes plant-eaters, meat- eaters, and omnivores ... phytoplankton. Close to hydrothermal (hot-water) vents, chemosynthetic bacteria are ECOLOGY OF THE OCEANS CHAPTER 6 135 ECOLOGY OF THE OCEANS 141 frond...

Ngày tải lên: 05/08/2014, 14:20

... direction of the four points of the compass (north, south, east, west). In the Northern Hemi- sphere the North Star (Polaris) shows north. In the Southern Hemisphere the cluster of stars called the ... summer, is timed to coin- cide with the productive time of the year for the plankton and small fish on which they feed. In the late southern sum- 148 OCEANS a p...

Ngày tải lên: 05/08/2014, 14:20

... the near future. 1 94 OCEANS THE USES OF THE OCEANS 193 attractive to prospectors. By the late 1990s more than 30 percent of the world’s oil was being extracted from beneath the sea. Most of the ... pages 203–2 04) . The sea’s military importance Since the time of the great civilizations of ancient Egypt, Greece, and Rome in the first millennium B.C.E.,...

Ngày tải lên: 05/08/2014, 14:20

... addition, the specter of global warm- ing looms large. The future of the oceans Many scientists suspect that global warming is the greatest short-term threat to the well-being of life on land and in the sea. ... reaching the surface of the Earth. In the last two decades thinning of the ozone layer over the Southern Ocean has resulted in a decline in the pr...

Ngày tải lên: 05/08/2014, 14:20

... 7, 42 44 from hydrothermal vents 43 in Indian Ocean 14 as pollution 206 from rivers 24, 42 43 , 49 , 206 seafloor spreading and 35 on sheltered shores 48 49 from space 44 sedimentary rock 42 , 46 , ... sultan) 1 64 meiofauna 142 – 143 merchant fleets 181 mercury 2 04 205 meroplankton 105–106 mesopelagic zone 143 – 144 metals heavy 26, 2 04 205 from hydrothermal vents 43 magn...

Ngày tải lên: 05/08/2014, 14:20

... OOATool supporting the Coad- Yourdon method. The current stage in the history of the object-oriented paradigm is characterised by an awareness of the issues related to the necessity of developing ... system-defined classes of object. They are the basic modelling semantics for supporting version management in the object-oriented model. Therefore, each class in the mod...

Ngày tải lên: 08/08/2014, 00:23

... | | 141 142 8 Cái bóng của bản ngã Sầu não hay gắn bó nào có thể còn có đấy cho linh hồn đã chứng ngộ - người trí huệ - khi mọi đối tượng hữu tình ... mới mẻ hàng ngày. Bây giờ sẽ không có bụi bặm đọng vào tấm gương | | 143 144 Người ấy không phải là chuyên gia - người ấy không phải là chuyên gia chút nào. Nếu bạn hỏi người ấy về một ......

Ngày tải lên: 22/07/2014, 00:20