61. The ocean surface currents follow clockwise circulatory paths in the northern parts of the Pacific and Atlantic oceans due to the ________
62. Why are the ports of Baltic sea opened for trade in winter?
63. The reason behind broadening the river valley is
64. Which one of the following factors is responsible for the change in the regular direction of the ocean currents in the Indian Ocean?
65. Imaginary lines connecting places in oceans having equal salinity are called
66. The ideal conditions for coral growth are:
I. water temperature around 20°C
II. tropical waters (between 30°N and 30°S)
III. highly saline water
IV. adequate oxygen
I. water temperature around 20°C
II. tropical waters (between 30°N and 30°S)
III. highly saline water
IV. adequate oxygen
67. Which of the following current is responsible for rise in temperature in westen Europe?
68. What is the correct decreasing order of the share of different salts in sea water?
69. Which one of the following European countries borders Atlantic Ocean?
70. The Lena river passes through which country?
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