earth's crust, called tectonic plates. The place where two plates meet is called a fault. A
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the shaking and movement of the ground when energy is released in the form of waves
Many of us might have experienced an earthquake in our lives. An earthquake is
These waves are called seismic waves. They seem to be very similar to ocean waves,
which can be seen moving through water. Seismic waves, however, move through the
ground. Most earthquakes are caused by the movement of the large sections of the
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D.
different directions, they build up high energy at the fault line. When enough energy
builds up at the fault line, the stress on the fault becomes too high and it ruptures. This
act releases the energy, and the ground starts to tremble. Earthquakes can also be
caused by other natural events, such as landslides and volcanic eruptions. The first
movement of an earthquake, called the main shock, is often followed by smaller
earthquakes called aftershocks. These aftershocks occur because the plates settle into
their new position. Aftershocks may continue for daysafter mainshick completed
d) Write a summary of the passage.
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Answer: Earthquake, any sudden shaking of the ground caused by the passage of seismic waves through Earth's rocks. A fault is a fracture or zone of fractures between two blocks of rock. Faults allow the blocks to move relative to each other. Earth scientists use the angle of the fault with respect to the surface (known as the dip) and the direction of slip along the fault to classify faults. From the deepest ocean trench to the tallest mountain, plate tectonics explains the features and movement of Earth's surface in the present and the past. Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core.
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