Answer:
C. The greater an element's density, the smaller the amount of it found in the crust
Explanation:
The layering of the Earth happened because of the different densities of the elements from which it was made. The denser elements started to sink deeper, the elements with medium density occupied the central part, and the elements with the smallest density remained at the surface. This resulted in the formation of the three basic layers of the Earth, core, mantle and crust. The core is composed of the densest elements, the mantle of the ones with medium density, and the crust from the ones with smallest density.
B. the most dangerous job in the United States.
Mining is considered one of the most dangerous jobs in the World and 50-60 mining workers die in the United States every year. They are in danger from workplace accidents such as explosions, cave-ins and chemical leakages. Therefore it makes sense that this would be the answer.
If the weight were attached to a rod instead of a spring, then the seismograph would not function. Thus, the correct answer is E.
<h3 /><h3>What is seismograph?</h3>
Seismograph are refers as instruments used to measure the intensity of the earthquake by identifying the epicentre of it.
A pen connected to the weight rests its point on a drum that can revolve. When the drum gently rotates, the pen draws a straight line on paper that has been tightly wound around it.
A seismograph consists of a heavy weight attached to a frame by a spring or wire. When this spring is replaced by rod, then in this case the seismography will not work.
Therefore, option E the seismograph would not function is the appropriate answer.
Learn more about seismograph, here:
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