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
70481
The 2004 Indian Ocean Tsunami was triggered by a massive earthquake off the coast of:
Answer:
Sumatra, Indonesia
The 2004 disaster was caused by a magnitude 9.1–9.3 earthquake off the west coast of northern Sumatra, Indonesia.
70482
Which type of seismic wave travels the fastest and is the first to be recorded by a seismograph?
Answer:
P-waves (Primary)
P-waves (Primary waves) are compressional waves that travel fastest through the Earth and arrive first at seismic stations.
70483
The largest earthquake ever recorded in history occurred in 1960 in which country?
Answer:
Chile
The 1960 Valdivia earthquake in Chile is the most powerful earthquake ever recorded, with a magnitude of 9.5.
70484
The point within the Earth where an earthquake rupture starts is called the:
Answer:
Hypocenter (Focus)
The hypocenter (or focus) is the actual point underground where the rock breaks, while the epicenter is the point directly above it on the surface.
70485
Which scale is currently the most widely used by seismologists to measure the magnitude of large earthquakes?
Answer:
Moment Magnitude Scale (MMS)
The Moment Magnitude Scale (Mw) is preferred for large earthquakes because it does not saturate like the Richter scale and measures the total energy released.
70486
Which Indonesian volcano erupted violently in 1883, causing global climate effects?
Answer:
Krakatoa
Krakatoa, in Indonesia, erupted in 1883, causing global cooling, and remains active, as noted in web sources on historic eruptions. Tambora and Toba had earlier impacts, Rinjani is less significant, making Krakatoa the correct choice for this additional MCQ.
70487
Which Antarctic volcano is one of the southernmost active volcanoes?
Answer:
Mount Erebus
Mount Erebus, in Antarctica, is the southernmost active volcano, with ongoing activity noted in X posts. Mount Hope and Mount Melbourne are less active, Deception Island is a caldera, making Mount Erebus the correct choice for this additional MCQ.
70488
Which Icelandic volcano is monitored for potential 2025 eruptions?
Answer:
Hekla
Hekla, in Iceland, is a highly active volcano monitored for potential 2025 eruptions, as noted in web sources on Iceland’s volcanic activity. Katla, Eyjafjallajökull, and Grímsvötn are also active but less emphasized in 2025, making Hekla the correct choice.
70489
Which Canary Islands volcano had ash studies conducted in 2025?
Answer:
El Hierro
Cumbre Vieja, on La Palma, Canary Islands, Spain, had volcanic ash analyzed in 2025, as reported in web sources. Teide, El Hierro, and Timanfaya are other volcanoes but lack 2025 ash studies, making Cumbre Vieja the correct choice.
70490
Which Hawaiian volcano, one of the world’s largest, shares a magma source with Kilauea?
Answer:
Mauna Loa
Mauna Loa, in Hawaii, USA, is one of the world’s largest volcanoes, with 2025 studies confirming its shared magma source with Kilauea, as per web sources. Mauna Kea and Haleakalā are dormant, Lo‘ihi is underwater, making Mauna Loa the correct choice.