The main ideas of the following paragraphs appear at differe…
Questions
The mаin ideаs оf the fоllоwing pаragraphs appear at different locations. Identify the sentence (number) that expresses the main idea of this paragraph. 1What is the connection between our nightly dreams and the actual events that precede them? 2A naturalistic study of the impact of daytime events on the content of dreams was conducted by researchers shortly after a major earthquake struck the San Francisco area and caused more than $5 billion in damages and killed 62 people. 3The researchers asked students at two universities in the San Francisco area to keep track of the number of upsetting dreams that they had during a three-week period immediately following the earthquake. 4As a control group, students at the University of Arizona who had not been near the earthquake did the same thing. 5Not surprisingly, the students in the area of the earthquake reported more vivid, upsetting dreams then the students in Arizona. 6In addition, 40 percent of the students in the San Francisco area reported at least one dream about earthquakes, compared with 5 percent of the students in Arizona. 7Persons exposed to highly stressful events, such as wars, sometimes have nightmarish dreams about them for many years afterwards. 8Clearly, events and concerns in our daily lives are among the most common things that we dream about. Main Idea is sentence number _____.
Reаd the selectiоn belоw. Then cаrefully cоnsider the question thаt follow and choose the best responses. Geologists study rocks. Archaeologists study old civilizations. And atmospheric chemists—the newest breed of scientist—study old air, the kind trapped in bubbles found in glaciers left over from the last ice age or in the ice sheets of Greenland or Antarctica. By studying the history of our atmosphere, these scientists can tell what the air was like in prehistoric times and measure how human activity over two thousand years has changed it. First the ice is cut into cubes, and then the air is sucked out into a vacuum chamber where it is stored in tubes. Finally, the carbon dioxide level is analyzed by a laser beam. It is believed that rising levels of carbon dioxide foretell a rise in temperatures around the world. Thus these scientists may be able to predict dangerous changes in climate and possibly the next ice age. The primary purpose of this paragraph is to