1. A recording of ground motion is a process that describes the movement of the ground after an earthquake occurs. Ground motion is the movement of the Earth's exterior after an earthquake. It produced waves from a sudden slip on a fault or sudden pressure. An earthquake is a phenomenon as a result of a sudden release of deposited energy in the Earth's crust creating seismic waves. Seismic waves are recorded and measured by a seismograph.
2. Motion, move, movement refer to change of position in space. Motion denotes change of position, either considered apart from, or as a characteristic of, something that moves; usually the former, in which case it is often a somewhat technical or scientific term: perpetual motion.
3. The difference between Break and Crack
When used as nouns, break means an instance of breaking something into two or more pieces, whereas crack means a thin and usually jagged space opened in a previously solid material.
When used as verbs, break means to separate into two or more pieces, to fracture or crack, by a process that cannot easily be reversed for reassembly. to crack or fracture (bone) under a physical strain, whereas crack means to form cracks.
Crack is also adjective with the meaning: highly trained and competent.
4. lithosphere
The lithosphere is the rocky outer part of the Earth. It is made up of the brittle crust and the top part of the upper mantle. The lithosphere is the coolest and most rigid part of the Earth.
