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#1
By TheQuizWire
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Medium
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Fact Checked
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22 Jan 2026
A deep trench, a volcanic arc, and deep earthquakes best indicate which type of tectonic plate boundary?
💡 Explanation:The simultaneous presence of a deep oceanic trench (where the denser plate sinks), a volcanic arc (formed by the melting of the mantle wedge above the subducting slab), and deep-focus earthquakes (caused by the sinking slab) is the definitive signature of an oceanic-continental convergent boundary, or subduction zone.
#2
By TheQuizWire
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Medium
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Fact Checked
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19 Jan 2026
Which layer of the Earth is primarily a liquid alloy of iron and nickel?
💡 Explanation:The Outer Core is the layer of the Earth composed of molten iron and nickel, which is responsible for generating the Earth's magnetic field through convection currents. The Inner Core is solid.
#3
By TheQuizWire
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Hard
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Fact Checked
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15 Jan 2026
What is the dominant force driving the movement of lithospheric plates according to modern models of plate tectonics?
💡 Explanation:Modern understanding of plate tectonics suggests that 'Slab Pull' is the strongest force driving plate movement. This force is the result of the gravitational sinking of cold, dense oceanic lithosphere into the mantle at subduction zones (trenches), dragging the rest of the plate along behind it. 'Ridge Push' is a secondary force caused by gravity sliding the elevated, newly formed lithosphere away from the mid-ocean ridges. While mantle convection (Basal Traction/Drag) is the ultimate source of heat and is part of the system, it is generally considered a minor or resisting force compared to the gravitational forces of slab pull and ridge push.
#4
By TheQuizWire
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Hard
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Fact Checked
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02 Jan 2026
What magma property most directly dictates a volcano’s explosive eruption style?
💡 Explanation:The explosiveness of a volcanic eruption is primarily dictated by the magma's viscosity. High viscosity, typically associated with high-silica (felsic/intermediate) magma, prevents dissolved gases from escaping easily. This gas entrapment leads to a rapid and massive pressure build-up within the magma chamber, culminating in a violent, explosive eruption, characteristic of stratovolcanoes.
#5
By TheQuizWire
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Medium
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08 Nov 2025
What is the physical state of the Earth’s outer core?
💡 Explanation:The Earth's outer core is a liquid layer of molten iron and nickel that generates the planet's magnetic field.
#6
By TheQuizWire
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Medium
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08 Nov 2025
What is the primary method used by geologists and archaeologists to determine the absolute age of geological materials (like rocks or fossils) based on the known decay rates of radioactive isotopes?
💡 Explanation:Radiometric dating measures the ratio of parent radioactive isotopes (like Uranium or Carbon-14) to their stable daughter products to calculate the precise numerical age of materials.
#7
By TheQuizWire
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Medium
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07 Nov 2025
What is the primary mechanism within the Earth’s mantle that causes the movement of tectonic plates on the lithosphere?
💡 Explanation:Tectonic plates move primarily due to thermal convection currents circulating within the Earth's mantle. Heat from the core causes mantle material to rise (less dense) and cooler material to sink (more dense), driving the plates like a conveyor belt.
#8
By TheQuizWire
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Medium
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04 Nov 2025
Which atmospheric layer contains the ozone layer?
💡 Explanation:The Stratosphere houses the ozone layer, which protects Earth by absorbing harmful UV radiation.
#9
By TheQuizWire
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Medium
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03 Nov 2025
How are igneous rocks primarily formed?
💡 Explanation:Igneous rocks form through the cooling and solidification of magma or lava.
#10
By TheQuizWire
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Easy
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03 Nov 2025
The Mohs scale measures which mineral property?
💡 Explanation:The Mohs scale ranks mineral hardness from 1 (talc) to 10 (diamond).
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