geomorphology & earth landforms section 5 MCQ Questions & Answers Detailed Explanation

Answer: (d)

Answer: (a)

Composite volcanoes are most commonly found in island arcs. Most of them are found scattered on the islands adjoining the Pacific Ring of Fire where about 75% of Earth's volcanoes are found.

It is a region of high volcanic and seismic activity that surrounds the majority of the Pacific Ocean Basin.

Answer: (a)

Hydration or Hydrolysis is the chemical reaction which involves cleavage of chemical bonds by water molecule or addition of water.

Answer: (a)

Magnetic declination is the angle between compass north (the direction the north end of a compass needle points) and true north (the direction along the earth’s surface towards the geographic North Pole.

Answer: (a)

Volcanic activity occurs at two types of plate boundaries: mid-ocean ridges and subduction zones.

At mid-ocean ridges, basaltic eruptions produce new sea-floor crust. These underwater eruptions don’t produce big mountainous volcanoes, which is why they are often overlooked as the most volcanically active features on Earth.

Answer: (d)

Earthquake is a sudden and violent movement, or fracture, within the earth followed by the series of shocks resulting from this fracture. Earthquake is more likely to be of Tectonic origin and probably because of existence of a Fault.