TASK DEFINITION: Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
PROBLEM: Ponds are small bodies of fresh water that usually have no outlet; ponds are often are fed by underground springs. Like lakes, ponds are bordered by hills or low rises so the water is blocked from flowing directly downhill. Lakes are larger bodies of water. Lakes are usually fresh water, although the Great Salt Lake in Utah is just one exception. Water usually drains out of a lake through a river or a stream and all lakes lose water to evaporation. Lakes form in a variety of different ways: in depressions carved by glaciers, in calderas (Figure 1.1), and along tectonic faults, to name a few. Subglacial lakes are even found below a frozen ice cap. As a result of geologic history and the arrangement of land masses, most lakes are in the Northern Hemisphere. In fact, more than 60% of all the worlds lakes are in Canada most of these lakes were formed by the glaciers that covered most of Canada in the last Ice Age (Figure 1.2). Lakes are not permanent features of a landscape. Some come and go with the seasons, as water levels rise and fall. Over a longer time, lakes disappear when they fill with sediments, if the springs or streams that fill them diminish, (a) Crater Lake in Oregon is in a volcanic caldera. Lakes can also form in volcanic craters and impact craters. (b) The Great Lakes fill depressions eroded as glaciers scraped rock out from the landscape. (c) Lake Baikal, ice coated in winter in this image, formed as water filled up a tectonic faults. Lakes near Yellowknife were carved by glaciers during the last Ice Age. or if their outlets grow because of erosion. When the climate of an area changes, lakes can either expand or shrink (Figure 1.3). Lakes may disappear if precipitation significantly diminishes. Large lakes have tidal systems and currents, and can even affect weather patterns. The Great Lakes in the United States contain 22% of the worlds fresh surface water (Figure 1.1). The largest them, Lake Superior, has a tide that rises and falls several centimeters each day. The Great Lakes are large enough to alter the weather system in Northeastern United States by the lake effect, which is an increase in snow downwind of the relatively warm lakes. The Great Lakes are home to countless species of fish and wildlife. Many lakes are not natural, but are human-made. People dam a stream in a suitable spot and then let the water back up behind it, creating a lake. These lakes are called "reservoirs." Click image to the left or use the URL below. URL:

SOLUTION: which of these is not full of fresh water?

PROBLEM: Iron deficiency is the most common nutritional disorder affecting at least one third of world's population. Though anemia is common manifestation of iron deficiency, other effects of iron deficiency on various tissues, organs and systems are usually under recognized. Impaired brain development and cognitive, behavioural and psychomotor impairment are most worrisome manifestations of iron deficiency. Studies have demonstrated that some of these changes occurring during period of brain growth spurt (<2 years age) may be irreversible. Association of iron deficiency with febrile seizures, pica, breath holding spells, restless leg syndrome and thrombosis is increasingly being recognized. Impaired cell-mediated immunity and bactericidal function are generally noted in iron-deficient persons; however, the findings are inconsistent. Despite proven reversible functional immunological defects in vitro studies, a clinically important relationship between states of iron deficiency and susceptibility to infections remains controversial. Studies from malaria endemic regions have reported increased incidence of malaria in association with iron supplementation. These and some other aspects of iron deficiency are reviewed in this article.

SOLUTION: Which deficiency is the cause of restless leg syndrome?

PROBLEM: In October, Ubayd Steed, a sixth grader in Philadelphia, Pennsylvania, was taking a math test when he noticed a classmate looking at his paper. " I quickly turned my paper over," he said. Later that day, Ubayd met the cheater and told him not to do it again. Unfortunately, Ubayd' s experience is not unusual. Whether it's kids copying class -mates' answers during tests or friends sharing homework, cheating happens in schools every day. Experts say the behavior starts in the lower grades. Surveys show that one in three elementary students admits to cheating. Jacob Harder, a fourth grader in Ware, Massachusetts, has had classmates ask to copy his homework. "I wouldn't want to just tell them the answers," he says. So instead, he explains the task and encourages his classmates to do it themselves. But many kids find it hard to say no. "l hear from kids all the time, ' I can' t say no to a friend,'" says Eric Anderman, a professor at The Ohio State University who studies cheating in school. He says it' s important to say no from the start. "Then you _ , and the other kid gets the message," he says. Plus, he points out, "a real friend is not going to disown you because he or she couldn't copy your math homework." The kids doing the copying may feel they need to cheat to be accepted by other kids. And some students may cheat simply because others do. "If you' re in an atmosphere where cheating is common, you may think that if you don' t cheat, you' re at a disadvantage," says Michael Josephson, founder of the Josephson Institute of Ethics. But Josephson says students shouldn't think that way. "There are a lot of things kids do," he says. "You have to decide what kind of person you' re going to be." When school becomes too challenging, Anderman suggests going to the teacher rather than relying on the work of others. "It' s good to ask for help," he says.

SOLUTION:
Who advises kids to turn to teachers for help when they fall behind in studies'?