The seismograph

One of my favorite projects was making a Seismograph.  The following is a written report on it:

My project demonstrates a seismograph which will detect earthquakes.
 A seismograph is the device scientists use to measure earthquakes. The main purpose of it is to accurately record the motion of the ground during an earthquake. It works on the principle of inertia of stationary objects. 
Earthquakes are classified based on the type of damage they create. The Richter scale is a standard scale used to classify quakes. It is a logarithmic scale, meaning that the numbers on the scale measure factors of 10.  On this scale, anything which measures below 2.0 is undetectable to a normal person and are called microquakes which occur constantly. A moderate (an average) earthquake measures 6.0 or less. An earthquake above 6.0 can cause hefty damage.
My project, a seismograph, which is a steel structure attached onto a wooden base and suspended from the iron structure is a ribbon and a pen from the plastic bottle.


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