EARTH SCIENCE
EARTHQUAKES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An explosion that ruptures Earth’s surface
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Up-down or sideways wave-like shaking motion
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The widening of large cracks or fissures over the years
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A bulging of the ground that takes place over a few days
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Detailed explanation-1: -The surface of Earth is a thin, solid crust enclosing a mostly solid mantle and molten core of lava. When the mantle moves, it disturbs the crust at specific locations, which causes earthquakes. How is an earthquake felt on the crust? Up-down or sideways wave-like shaking motion.
Detailed explanation-2: -Earthquakes are the result of sudden movement along faults within the Earth. The movement releases stored-up ‘elastic strain’ energy in the form of seismic waves, which propagate through the Earth and cause the ground surface to shake.
Detailed explanation-3: -An earthquake is the result of a sudden release of energy in the Earth’s crust that creates vibrations or seismic waves that radiate up to the surface, causing the ground to shake. Earthquakes may last only a few seconds or may continue for up to several minutes.
Detailed explanation-4: -An earthquake is the sudden movement of Earth’s crust at a fault line. The location where an earthquake begins is called the epicenter. An earthquake’s most intense shaking is often felt near the epicenter.
Detailed explanation-5: -These waves are called seismic or earthquake waves. There are different kinds of earthquake waves: body waves and surface waves.