نمونه سوالات آزمون های کارشناسی ارشد علوم زمین زبان عمومی و تخصصی (انگلیسی) امتحانات 94-86 - بخش (3)

The job of the scientist has always been to search out explanations for things that happen in the Universe. Such -------1------- events or happenings are often known as phenomena. The simplest science arose from observing phenomena ------2------- questions to find out why they occurred. Before the 17th century scientists generally sought answers to these questions by reading what somebody ------3------ abom them, or by consulting some known and respected man of learning. Explanati`ons of phenomena gained ------4------ way were usually just guesses, although occasionally the guesses were right. ------5------a few exceptions, scientists did not try things out to see what,happened. One major exception was the Greek mathematician Archimedes, who in the 3rd century BC discovered the famous principle relating to relative density.