Rivers flowing over gentle slopes move more slowly. They move much more slowly than a mountain stream. These slow moving streams create different types of features than mountain streams. Slow moving water erodes the sides of their channels more than the bottom. Also, large curves in the stream form. These curves are called meanders. Meanders are caused by erosion and deposition. Remember, faster moving water causes erosion more quickly. Slower moving water erodes material more slowly. If water is moving slowly enough, the sediment being carried may settle out. This settling out, or dropping off, of sediment is deposition. The curves are called meanders because they slowly wander over the land. As meanders erode from side to side, they create a floodplain. This is a broad, flat area on both sides of a river. Eventually, a meander may become cut off from the rest of the river. This forms an oxbow lake.

Question: "Will water flowing over gentle slopes erode more of the sides of their channels or the bottom?"

OPTIONS:
- no
- yes

Answer: "Yes"

Response: no

Military Notification and Response. Boston Center did not follow the protocol in seeking military assistance through the prescribed chain of command. In addition to notifications within the FAA, Boston Center took the initiative, at 8:34, to contact the military through the FAA's Cape Cod facility. The center also tried to contact a former alert site in Atlantic City, unaware it had been phased out. At 8:37:52, Boston Center reached NEADS. This was the first notification received by the military-at any level-that American 11 had been hijacked: FAA: Hi. Boston Center TMU [Traffic Management Unit], we have a problem here. We have a hijacked aircraft headed towards New York, and we need you guys to, we need someone to scramble some F-16s or something up there, help us out. NEADS: Is this real-world or exercise? FAA: No, this is not an exercise, not a test. NEADS ordered to battle stations the two F-15 alert aircraft at Otis Air Force Base in Falmouth, Massachusetts, 153 miles away from New York City. The air defense of America began with this call. At NEADS, the report of the hijacking was relayed immediately to Battle Commander Colonel Robert Marr. After ordering the Otis fighters to battle stations, Colonel Marr phoned Major General Larry Arnold, commanding general of the First Air Force and NORAD's Continental Region. Marr sought authorization to scramble the Otis fighters. General Arnold later recalled instructing Marr to "go ahead and scramble them, and we'll get authorities later." General Arnold then called NORAD headquarters to report. F-15 fighters were scrambled at 8:46 from Otis Air Force Base.

Question: "What is the name of the general involved in the report?"

OPTIONS:
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- yes

Answer: "Larry Arnold"

Response: yes

For thousands of years, people have found fossils. The fossils caused curiosity about Earths past. How did these organisms live? What type of world did they live in? Fossils can tell us a lot about Earths history. In ancient times, fossils inspired myths and stories. These stories included tales of monsters and other incredible creatures. What type of creature do you know that could inspire such stories? Of course, dinosaur fossils were once mistaken for dragons bones. Two thousand years ago, people discovered fossils in China. At the time, they were thought to be dragon bones. We know now that these were not bones, but fossils. So what is the difference?

Question: "What were some fossils originally thought to be?"

OPTIONS:
- no
- yes

Answer: "fairies"

Response: no

The documentary portrays a behind-the-scenes look at the poor state of Argentina's civil aviation , and puts the blame on the Argentine Air Force . The Air Force has been in control of air traffic operations since the military takeover of General Juan Carlos Ongan a in 1966 . The producer/director , Enrique Pi eyro , claims Argentina and Nigeria are the only countries whose air force controls and regulates the airline industry . Pi eyro , a former Argentine airline pilot , makes his case in the documentary using diagrams , 3D animations , interviews , hidden cameras in the control tower , and a few props . For example , at one point he spills out a bag of plastic airplanes and equates it to the number of planes the air force has lost due to negligence . The film is heavily based on the Austral L neas A reas Flight 2553 plane crash . Enrique Pi eyro takes his camera , secretly , into the control tower of the Ministro Pistarini International Airport also-known-as Ezeiza , the international airport at Buenos Aires .

Question: "Who demonstrates the number of planes lost due to negligence with plastic planes?"

OPTIONS:
- no
- yes

Answer: "Ezeiza"

Response:
no