4. Answer the following in brief.
(a) Name the five oceans of the world.
(b) What is the deepest part in the Pacific Ocean called?
(c) Which ocean is situated in the Arctic Circe and surrounds North Pole:
(d) What is a marginal sea?
(e) Where is Lake Titicaca situated?
(f) What is a multinational river?
(g) How is the Arctic Ocean connected with the Pacific Ocean?
(h) Which water body is considered to be the lowest body of water on the surface of earth
(i) Name two seas which are marginal seas.
(j) List two points as to why rivers are important.
(k) How is global warming responsible for water pollution?
(l) What is eutrophication?
(m) Name the three states that River Murray passes through.
(n) Name the countries through which River Nile flows?
(o) Name the five countries that surround the Caspian Sea.
Answers
Answer:
(a) 1.The Arctic Ocean. ...
2.The Southern Ocean. ...
3.The Indian Ocean. ...
4.The Atlantic Ocean. ...
5.The Pacific Ocean.
(b) The Mariana Trench, in the Pacific Ocean, is the deepest location on Earth.
(c) The North Pole sits in the middle of the Arctic Ocean, on water that is almost always covered with ice. The ice is about 2-3 meters (6-10 feet) thick. The depth of the ocean at the North Pole is more than 4,000 meters (13,123 feet).
(d) Marginal seas are large, shallow bodies of water along continental edges or margins. Marginal seas include the Arabian Sea, the Baltic Sea, the Bering Sea, the Beaufort Sea, the Black Sea, the Gulf of California, the Gulf of Mexico, the Red Sea, and the Mediterranean Sea
(e) Lake Titicaca sits 3 810 m above sea level and is situated between Peru to the west and Bolivia to the east. Peruvian part is located in Puno department, in Puno and Huancane provinces. It covers 3 200 square miles (8 300 square km) and extends in a northwest-to-southeast direction for a distance of 120 miles (190 km).
(f) A transboundary river is a river that crosses at least one political border, either a border within a state or an international boundary. Bangladesh has the highest number of these rivers, including two of the world's largest rivers, the Ganges and the Brahmaputra.
(g) Located between Alaska and Russia, the Bering Strait is the only marine gateway between the icy Arctic and the Pacific Ocean. At its narrowest point, the strait is only 55 miles wide. ... But as Arctic sea ice continues to melt earlier in the season, more and more ships are beginning to use this narrow gateway.
(h) The Dead Sea - Image of the Week - Earth Watching. The Dead Sea, also called the Salt Sea, is a salt lake bordering Jordan to the east, and Israel to the west. Its surface and shores are 427 metres below sea level, Earth's lowest elevation on land.
(i) Marginal seas are large, shallow bodies of water along continental edges or margins. Marginal seas include the Arabian Sea, the Baltic Sea, the Bering Sea, the Beaufort Sea, the Black Sea, the Gulf of California, the Gulf of Mexico, the Red Sea, and the Mediterranean Sea (Fig. 2.20).