The adjacent illustration shows a seismogram record of an earthquake. How far away did the earthquake occur from the seismic station?
What will be an ideal response?
The seismogram indicates that the S-wave (the second wave on the seismogram) arrived about 5 minutes after the P-wave (the first wave on the seismogram). Using Figure 8.11, this is equivalent to approximately 4000 km away.
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What is the main cause of food insecurity?
A. poverty B. war C. government corruption D. land degradation
sedimentary deposits built into relatively regular layers are known as ________.
a - intrusive exfoliation b - detrital striations c - strata d - clastic inclusions e - granite
Rural to urban migration beginning in the 1800s in the United States was an outgrowth of
A) the Homestead Act. B) the establishment of the University system. C) a demographic shift in family size. D) the Industrial Revolution. E) food imports.
Presently, glaciers cover less than ____________________ percent of Earth’s land surface
Fill in the blank with correct word.