Daily Current Affairs Quiz: September 23, 2025

Answer: A [A large tidal range (greater than 6 meters) and a funnel-shaped estuary with a shallow depth and converging river banks, such as the Bay of Fundy. ]
Explanation:

Option (a) is correct: A large tidal range provides the necessary difference in water levels to drive the bore upstream. A funnel-shaped estuary with shallow depth and converging river banks amplifies the incoming tide, creating a wave. The Bay of Fundy, known for its extreme tidal range, exemplifies these conditions.

Option (b) is incorrect: A small tidal range and a wide, deep river mouth are not conducive to bore formation. The Mississippi River, despite its size, does not experience significant tidal bores due to its wide mouth and the relatively small tidal range in the Gulf of Mexico.

Option (c) is incorrect: While a moderate tidal range can contribute to some tidal effects, a deep ocean bay without the constricting topography of a river mouth or estuary is less likely to produce a notable bore. The Gulf of Mexico, although experiencing tides, doesn’t have prominent tidal bores.

Option (d) is incorrect: A wide, shallow continental shelf with strong offshore currents, as found in the Grand Banks, may experience strong tidal currents but not the characteristic upstream wave of a tidal bore. Bores require the confinement of a river or estuary to form.

Answer: B [Only two]
Explanation:

Statement 1 is correct: The Earth’s axis is tilted at about 23.5° relative to its orbital plane around the Sun. This axial tilt is the primary reason for the seasonal variations on Earth, as it affects how sunlight strikes different parts of the planet during the year.

Statement 2 is incorrect: Although the distance between the Earth and the Sun changes slightly because of the elliptical orbit, this variation (~3%) is too small to cause seasons. Moreover, seasons are opposite in the Northern and Southern Hemispheres, which would not be the case if distance alone determined seasonal changes. In fact, Earth is closest to the Sun during the Northern Hemisphere winter, which clearly shows that distance is not the main factor.

Statement 3 is correct: The tilt of the Earth’s axis causes different parts of the Earth to receive varying amounts of sunlight at different times of the year. This results in changes in both the angle of sunlight and the duration of daylight, producing warmer summers and colder winters in each hemisphere.

Statement 4 is incorrect: The Earth’s orbit around the Sun is not a perfect circle; it is slightly elliptical. However, this minor eccentricity has very little effect on seasonal changes, as the tilt of the axis is the dominant factor.

Answer: C [They are always found in their pure form. ]
Explanation:

Industrial minerals are used in a variety of industrial processes, are generally non-metallic, and can be either organic (like coal) or inorganic (like gypsum). However, they are not always found in pure form. They often require processing or refining to remove impurities before they can be used industrially.

Answer: B [Only two]
Explanation:

Statement 1 is incorrect: The Rocky Mountains are primarily formed by tectonic uplift and folding, not volcanic activity. While some volcanic activity has occurred in the region, it is not the primary force behind the mountains’ formation.

Statement 2 is correct: Mount Whitney, with an elevation of 14,505 feet (4,421 m), is the highest peak in the contiguous United States. It is located in the Sierra Nevada Mountain range in California.

Statement 3 is correct: The Cascade Range is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California. It is known for its volcanoes, including Mount St. Helens, Mount Rainier, Mount Hood, and Mount Shasta.

Answer: A [The shift of the Intertropical Convergence Zone (ITCZ).]
Explanation:

The ITCZ shifts northward during the summer months, causing a change in wind patterns and leading to the onset of the southwest monsoon in India. The warm temperatures over the Indian subcontinent create a low-pressure area that draws in moisture-laden winds from the Indian Ocean.