Who amongst the following correlated colour of ocean water and its salinity ?

• Ibn-Khaldun

• Al-Masudi

• Ibn-Sina

• Al-Maqdisi

The temperature that provides favourable ecological conditions for living coral reefs is

• less than 10°C

• 10°C to 15°C

• 15°C to 20°C

• more than 20°C

Which among the following has postuated the Subsidence Theory related to coral reef ?

• Dally

• Agassiz

• Darwin

• Davis

Several planned cities have been developed in India after Independence. Which one the following is not a post-independence planned city ?

• Gandhinagar

• Chandigarh

• Jaipur

• Bhubaneshwar

• a-ii , b-iii , c-i , d-iv

• a-iv , b-i , c-iv , d-i

• a-iii , b-ii , c-iv , d-i

• a-i , b-iv , c-ii , d-iii

If a tide occurs at a place at 6 p.m. when will be the next tide occur ?

• 00.13 a.m. of the next day

• 06.26 a.m. of the next day

• 12.39 p.m. of the next day

• 06.52 p.m. of the next day

• a-i , b-ii , c-iii , d-iv

• a-ii , b-i , c-iii , d-iv

• a-ii , b-iv , c-i , d-ii

• a-iv , b-iii , c-ii , d-i

68.

LIST I	LIST II
(a) Falkland current	(i) Warm current
(b) Norwegian current	(ii) Cold current
(c) Florida current	(iii) Atlantic Ocean
(d) Okholsk current	(iv) Kamchatka Peninsula

• a-ii , b-iii , c-i , d-iv

• a-i , b-ii , c-iii , d-iv

• a-iii , b-i , c-ii , d-iv

• a-iv , b-iii , c-i , d-ii

Surface ocean currents derive their energy from 

• Salinity

• Tectonics

• Wind

• Tsunamis

Especially high and low tides that occur near the times of new and full moons are called

• Spring tide

• Neap tide

• Super tide

• Fall tide