The inhabited history of the Las Vegas Valley stretches to 23,000 b.c. , when much of the area was covered by a prehistoric lake. During this period, the indigenous people lived in caves, hunting the mammals that gathered at the shoreline. The landscape of the valley changed dramatically over the next 200 centuries. The glaciers feeding the lake melted away and the lake evaporated. Fossils tell an obscure story of man's slow and sporadic development. Around 3000 b.c. , native Archaic Indians began to develop a lasting hunting and gathering culture. By this time, the valley was in much the same geographic state as it exists in today, with one exceptionthe presence of artesian springs that bubbled to the surface in several areas. These springs fed a network of streams draining through the Las Vegas Wash to the Colorado River. The areas surrounding the springs were desert oases: sprawling collections of grasses, trees, and wildlife. Many springs lay in areas that would eventually become the center of the modern Las Vegas metropolis. For about 4000 years, the Archaics thrived in a culture that included many signs of early civilization. Signs of even more advancement appeared halfway through the first millennium a.d. , when the Anasazi Indians inhabited the valley. Far more progressive than the Archaics, the Anasazi utilized such formal agricultural techniques as irrigation to assist their harvest. This permitted the Anasazi to achieve a benchmark of advanced societythe ability to live in permanent shelters year-round without need to follow wildlife. Mysteriously, the Anasazi vanished from the valley around a.d.

Question: "When did the native Archaic Indians develop a hunting and gathering culture?"

OPTIONS:
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- yes

Answer: "3000 B.C"

Response: yes

Flowing water causes sediment to move. Flowing water can erode both rocks and soil. You have already learned that materials can dissolve in water. With enough time, even rocks can be dissolved by water. This process happens really slowly. It may take over a million years to dissolve a rock. It doesnt matter how big the rock is. With enough time, flowing water can dissolve it. Moving water also has the ability to move small pieces of rock and soil. How can water move a rock? Doesnt it need energy? Of course, water gets its energy because it is moving. Moving water has kinetic energy. Things that have more energy can do more work. When water stops moving it will have no energy. It will no longer be able to move the rock and soil. When this happens the rock and soil will settle to the bottom of the calm water. Scientists call this process deposition.

Question: "How long might it take for water to dissolve a rock?"

Response: "It may take over a million years to dissolve a rock"
OPTIONS:
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- yes

A: yes

Problem: One look at Fred Rooney, and you just know he's the good guy. A trace of childish innocence in his face gives the lanky Bethlehem lawyer a Jimmy Stewart-like quality of quiet trust. In black jeans and button-down shirt, he's a kind of folk hero in the south Bethlehem melting pot where he's crafted a law practice catering to working-class families - mostly Latino - in the shadow of the hulkish remnants of Bethlehem Steel. A two-hour drive away, at City University of New York Law School in Queens, Rooney spends several days a week helping upstart lawyers develop storefront practices that, like his, provide legal representation to folks who can't afford a $250-an-hour legal counselor. Kristin Booth Glen, the law school's dean, took one look at Rooney and knew he was the right person to head the innovative Community Legal Resources Network. ''Fred's so low-key, he's Midwestern in effect,'' says Glen, a former New York Supreme Court judge. ''He captivates people, he inspires loyalty.'' For bringing legal representation to the poor and a host of other social causes, including finding medical care for seriously ill children in Latin America, the Moravian College Alumni Association has chosen Rooney for its prestigious Haupert Humanitarian Award. The award, given to only a select few alumni, will be presented at 7:30 tonight at a reception on Moravian's Priscilla Payne Hurd campus. Moravian, where he was an undergraduate in the early 1970s, inspired Rooney's deep sense of social justice. The son of a Bethlehem Steel executive in New York, he came to the Bethlehem campus from an affluent upbringing on Long Island. The young Rooney might have set his sights on Washington, D.C., like his uncle, former U.S. Rep. Fred Rooney of Bethlehem. After all, politics run in the Rooney family. His brother, state Rep. T.J. Rooney of Bethlehem, is a power in the state Legislature and the Democratic Party. But on a trip to Colombia when he was a junior at Moravian, the child of privilege saw human suffering, malnutrition and poverty the likes of which he had never imagined. ''I couldn't understand why we live this way and they live that way,'' Rooney recalled. ''It's been the guiding light of my life ever since.'' After graduating in CUNY Law School's first class in 1986, he took a job with Lehigh Valley Legal Services.

Question: "How did Fred Rooney physically look?"

Answer: "Suspicious"

OPTIONS:
- no
- yes
Answer: no

On Thursday Fort Waelhem succumbed after a magnificent resistance. The garrison held it until it was a mere heap of ruins, and, indeed, they had the greatest difficulty in making their way out. I think that there is very little doubt that the Germans were using against these forts their largest guns, the great 42-centimetre howitzers. It is known that two of these were brought northwards past Brussels after the fall of Maubeuge, and a fragment which was given to us was almost conclusive. It was brought to us one morning as an offering by a grateful patient, and it came from the neighbourhood of Fort Waelhem. It was a mass of polished steel two feet long, a foot wide, and three inches thick, and it weighed about fifty pounds. It was very irregular in shape, with edges sharp as razors, without a particle of rust upon it. It had been picked up where it fell still hot, and it was by far the finest fragment of shell I have ever seen. Alas we had to leave it behind, and it lies buried in a back-garden beside our hospital. Some day it will be dug up, and will be exhibited as conclusive evidence that the Germans did use their big guns in shelling the town.

Question: "What town was the gun fragment found in?"

OPTIONS:
- no
- yes

Answer: "Fort Waelheim"

Response:
yes