All Categories MCQs
Topic Notes: All Categories
General Description
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
70471
A 'tsunami' is a Japanese word meaning:
Answer:
Harbor wave
Tsunami translates to 'harbor wave' (tsu = harbor, nami = wave).
70472
The 'Ring of Fire', home to 90% of the world's earthquakes, surrounds which ocean?
Answer:
Pacific Ocean
The Ring of Fire is a horseshoe-shaped belt around the Pacific Ocean basin known for frequent earthquakes and volcanic eruptions.
70473
What does the Mercalli Intensity Scale measure?
Answer:
The observed effects and damage causing by shaking
The Modified Mercalli Scale measures intensity based on observed effects on people, buildings, and the ground, using Roman numerals (I to XII).
70474
Most earthquakes occur along:
Answer:
Tectonic plate boundaries
The vast majority of earthquakes occur at the boundaries of tectonic plates where plates interact (diverge, converge, or slide past each other).
70475
The deadliest earthquake of the 20th century occurred in 1976 in which Chinese city?
Answer:
Tangshan
The 1976 Tangshan earthquake is officially reported to have killed roughly 242,000 people, making it the deadliest of the 20th century.
70476
S-waves (Secondary waves) typically cannot travel through:
Answer:
Both B and C
S-waves are shear waves that can only travel through solids; they cannot propagate through liquids or gases (which is why they stop at Earth's liquid outer core).
70477
The famous 1906 San Francisco earthquake was caused by a rupture on which fault?
Answer:
San Andreas Fault
The 1906 earthquake was caused by a slip of the San Andreas Fault, resulting in widespread fires that destroyed much of San Francisco.
70478
Which theory explains how energy builds up in rocks and is released during an earthquake?
Answer:
Elastic Rebound Theory
Elastic Rebound Theory states that rocks strain and deform under stress until they break (fault), snapping back to their original shape and releasing energy.
70479
The 2011 Tōhoku earthquake in Japan triggered a nuclear disaster at which power plant?
Answer:
Fukushima Daiichi
The 2011 Tōhoku earthquake and subsequent tsunami disabled the power supply and cooling of three reactors at the Fukushima Daiichi Nuclear Power Plant.
70480
The phenomenon where saturated soil loses its strength and behaves like a liquid during an earthquake is called:
Answer:
Liquefaction
Liquefaction occurs when intense shaking causes water-saturated granular soil to temporarily lose its strength and act as a fluid.