Unique Academic Board Solutions for Exercise 1: Self-Evaluation Test

Consider the following statements:

1. El-Nino is caused due to the occurrence of a warm current off the coast of Peru.

2. La-Nina is caused due to the occurrence of a cold current off the coast of Australia.

Which of the following statement/statements is/are correct?

With reference to North Equatorial Current, consider the below statements:

1. It is a significant Pacific and the Atlantic Ocean current that flows from east to west.
2. They flow in between 10 degrees north and 20 degrees north latitudes.
3. The current passes or cuts through the equator hence, the name North Equatorial Current.
4. In both oceans, it is separated from the equatorial circulation by the equatorial counter-current, which flows eastward.

Which of the above statements is/are correct?

Which of the following statements about ocean currents is/are correct?

1. In tropical and subtropical latitudes, the western coasts are bordered by cold water currents, which cause fog in this region.
2. In middle and higher latitudes, the western coasts are bordered by warm currents that cool summers and mild winters in those regions.

Select the correct answer using the codes given below:

Other than coral bleaching, what are the possible reasons for the loss of corals especially in great barrier reefs?

1. Tropical cyclones
2. Albedo effect
3. Coral-feeding starfish
4. Ocean Warming

Select the correct answer using the code given below:

Which of the following is a relief feature of the ocean floor?

1. Seamount
2. Guyots
3. Atoll

Select the correct answer using the following codes:

The Sargasso Sea is a vast patch of the Atlantic Ocean characterised by abundant floating brown seaweed called 'Sargassum.' This is formed due to the deposit of marine plants and refuse carried by the:

1. North Atlantic Current  
2. Canary current
3. North Atlantic Equatorial current
Select the correct answer using the following codes:

Which of the following are the factors affecting Ocean Salinity?

1. Formation of ice on the sea surface.
2. The influx of fresh river waters.
3. Ocean Currents
4. Environmental Pollution
5. Precipitation
6. Wind

Select the correct answer from the codes given below: