If you build a campfire, you start with a large stack of sticks and logs. As the fire burns, the stack slowly shrinks. By the end of the evening, all that is left is a small pile of ashes. What happened to the matter that you started with? Was it destroyed by the flames? It may seem that way. What do you think happened? The truth is that the same amount of matter still exists. The wood changed not only to ashes, but also to carbon dioxide, water vapor, and other gases. The gases floated off into the air, leaving behind just the ashes. Although matter was changed, it was not created or destroyed. Because the same amount of matter still exists, we can say that matter is conserved. You may wonder how it can be conserved if something is now missing? Assume you had measured the mass of the wood before you burned it. Assume you had also trapped the gases released by the burning wood and measured their mass and the mass of the ashes. What would you find? The ashes and gases combined have the same mass as the wood you started with. This example illustrates the law of conservation of mass.

Question: "Ashes and gases in an example of what?"

OPTIONS:
- no
- yes

Answer: "Matter"

Response: yes

I had drunk too much, I confess, though we all had. Somehow, Tasha and I began to argue the worth of Solevgrad jazz, as inconsequential a topic as I can imagine. She had studied it in school, so she thought herself as an expert. I once had a neighbor who played it constantly, loudly, and badly, so I thought I knew it better. Malaquez tried to mediate, but I saw him as siding with Tasha. So, I think, did she. The subject shifted from music to Tasha's obsession with fame, undoubtedly by a leap that I made. She had no choice but to follow. (I do not remember any of this well, just now, nor do I care to. Those who are truly curious may look at the last act of "Captured Moments.") I remember suggesting, with characteristic tact, that she add Emil to her small list of major accomplishments. Malaquez glanced away, embarrassed. Tasha looked at me as if to say, "I will." She said, "I feel sorry for you, Nardo. I'll see Emil home." "Yes," I said, "Do that," and did not care what she did, or why. Emil asked, "You're all right?" I muttered something he must have interpreted as assent. They both walked up to Emil's home while I watched the scarlet moonlight ripple on distant waves. Disgusted with Tasha but more disgusted with myself, I finally realized she would not return that night and went into The Sleeping Flamingo to drink myself to sleep. She had not come home when I woke in mid-morning.

Question: "What did Nardo's neighbour play constantly, loudly, and badly?"

Response: "Soul music"
OPTIONS:
- no
- yes

A: no

Problem: "The impact of her interest and work on the provision of legal services in the state of California is immeasurable," said Patricia Philips, senior of-counsel for Los Angeles' Morrison & Foerster. "Its value is felt every day by someone who would otherwise be floundering around in the legal system yet dealing with very serious problems." Zelon's public-interest work has not gone unnoticed. Several organizations that share her commitment to public service - including the National Legal Aid & Defender Association and the State Bar of California - have honored her. Two years ago, Zelon received the Laurie D. Zelon Pro Bono Award, which had been named for her one year earlier by the Law Firm Pro Bono Project, which she'd helped found. "I didn't find out until I was standing in the great hall of the Supreme Court, surrounded by 300 people who were there, that the award had been named for me and was thereafter going to be given in my name. It's very hard to believe, for anyone who knows me well, but I was actually speechless for a period," Zelon said. Zelon faced one of the greatest challenges of her legal career, she said, when her appointment to the bench forced her to switch gears from civil litigation to criminal law. "It was a steep learning curve for me," she said. "It's a whole different set of processes. The rules are different. The case law is a whole body unto itself." Attorneys praise Zelon for her thorough understanding of the law. "She's extremely well-versed in the law," Leon said. "She's very thorough in her research," Wong said. Of course, not all attorneys concur with every decision Zelon makes in court. Some city attorneys disagree with her interpretation of evidentiary statutes when Zelon puts limits on their use of hearsay testimony. But lawyers who have appeared before her say that they appreciate her intelligent interpretation of the law.

Question: "How did Patricia Philips' work and interest make an impact on the provision of legal services in the state of California?"

Answer: "She received the Laurie D. Zelon Pro Bono Award"

OPTIONS:
- no
- yes
Answer: no

When American 11 struck the World Trade Center at 8:46, no one in the White House or traveling with the President knew that it had been hijacked. While that information circulated within the FAA, we found no evidence that the hijacking was reported to any other agency in Washington before 8:46. Most federal agencies learned about the crash in New York from CNN. Within the FAA, the administrator, Jane Garvey, and her acting deputy, Monte Belger, had not been told of a confirmed hijacking before they learned from television that a plane had crashed. Others in the agency were aware of it, as we explained earlier in this chapter. Inside the National Military Command Center, the deputy director of operations and his assistant began notifying senior Pentagon officials of the incident. At about 9:00, the senior NMCC operations officer reached out to the FAA operations center for information. Although the NMCC was advised of the hijacking of American 11, the scrambling of jets was not discussed. In Sarasota, Florida, the presidential motorcade was arriving at the Emma E. Booker Elementary School, where President Bush was to read to a class and talk about education. White House Chief of Staff Andrew Card told us he was standing with the President outside the classroom when Senior Advisor to the President Karl Rove first informed them that a small, twin-engine plane had crashed into the World Trade Center. The President's reaction was that the incident must have been caused by pilot error. At 8:55, before entering the classroom, the President spoke to National Security Advisor Condoleezza Rice, who was at the White House. She recalled first telling the President it was a twin-engine aircraft-and then a commercial aircraft-that had struck the World Trade Center, adding "that's all we know right now, Mr. President." At the White House, Vice President Dick Cheney had just sat down for a meeting when his assistant told him to turn on his television because a plane had struck the NorthTower of the World Trade Center. The Vice President was wondering "How the hell could a plane hit the World Trade Center" when he saw the second aircraft strike the South Tower. Elsewhere in the White House, a series of 9:00 meetings was about to begin. In the absence of information that the crash was anything other than an accident, the White House staff monitored the news as they went ahead with their regular schedules.

Question: "What airplane crash did most federal agencies learn about through CNN, rather than their own internal reporting channels?"

OPTIONS:
- no
- yes

Answer: "A small twin-engine plane"

Response:
no