Answer: To locate the epicenter of an earthquake, scientists must have seismograms from at least three seismic stations.
Explanation: I hope this helps:)
A reef than surrounds a volcanic island is an : Atoll
Atoll usually takes shapes in a form of ring that surround the areas of volcanic island that consist of corals. It usually only exist in warm waters, so volcanic islands will provide perfect environment for the corals
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The answer is B.
There are 28 days in February. 28 in Spanish is 'veinticinco' and therefore B. is the correct answer.
What you're looking for in here is the hardness: a material can scratch another material if it's harder than it.
So the desired material cannot be harder than amphibole, which has a hardness of 6.
But it has to be harder than fluorite, which has a hardness of 4.
So we're looking for a hardness of between 4 and 6 and from the table we see it's magnesite (we'll need a hard magesite) - this is the correct answer!
It would be normal faulting, like the Mid-Atlantic Ridge
