define ;
a) seismograph
b) tectonic plates
c) Richter scale
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Answered by
1
Answer:
A seismometer is an instrument that responds to ground motions, such as caused by earthquakes, volcanic eruptions, and explosions. Seismometers are usually combined with a timing device and a recording device to form a seismograph.
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2
Answer:
a)an instrument that measures and records details of earthquakes, such as force and duration.
b) Plate tectonics is a scientific theory describing the large-scale motion of seven large plates and the movements of a larger number of smaller plates of Earth's lithosphere, since tectonic processes began on Earth between 3.3 and 3.5 billion years ago.
c) a numerical scale for expressing the magnitude of an earthquake on the basis of seismograph oscillations.
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