hydrosphere & oceanography section 6 MCQ Questions & Answers Detailed Explanation

Answer: (d)

Answer: (d)

Spring Tides refer to either of the two tides that occur at or just after the new moon and full moon when the tide-generating force of the sun acts in the same direction as that of the moon, reinforcing it and causing the greatest rise and fall in tidal level.

The highest spring tides (equinoctial springs) occur at the equinoxes.

Answer: (d)

Answer: (a)

A tide is the periodic rising and falling of Earth’s ocean surface caused mainly by the gravitational pull of the Moon acting on the oceans. The height of tides varies somewhat with the phases of the Moon.

At New Moon and Full Moon, tides are higher because the Sun’s tidal force adds to the Moon’s. This is called “spring tide”.

Answer: (b)

The Nile is a major north-flowing river in northeastern Africa. It is generally regarded as the longest river in the world, however other conflicting sources cite a 2007 study that gave the title to the Amazon River in South America.

The River Nile is about 6,670 km (4,160 miles) in length and is the longest river in Africa and in the world.

Although it is generally associated with Egypt, only 22% of the Nile’s course runs through Egypt.

Answer: (a)

There are ocean currents which are found in given ocean. Agulhas is the warm current, Humboldt is cold current and Kanaries is cold current.