The point beneath earth’s surface where rock breaks under stress and triggers an earthquake is called the
a.
syncline.
b.
footwall.
c.
epicenter.
d.
focus.

Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite

Jessica finds out that the government introduced a new trade policy that will increase import tariffs. she calls for a meeting of all of the company'sdepartment heads to address this issue, since the new tariffs may increase the company's production costs. what is the purpose of this meeting? o a.operationsb.financec.strategic planningod.marketing

Which of the layers of the earth has the following three characteristics? i. it is made of molten rock. ii. it has currents that are constantly moving. iii. earth’s plates float on top of its currents.