Input: Energy often changes from one form to another. For example, the drummer transfers motion to sound energy. When the moving drumstick strikes the drum head, the drum starts to vibrate. The motion of the vibrating drum head creates the sound you hear. Any form of energy can change into any other form. Frequently, one form of energy changes into two or more different forms. Have you ever sat in front of a campfire? What are two things you notice? The fire creates light. It is also warm by the fire, meaning it creates heat. The energy of the fire comes from the stored energy in the wood. The wood contains chemical energy. As it burns, the chemical energy is changed into light and heat. Not all chemical energy changes produce light and heat. Our cars use gasoline as a fuel. Gasoline contains chemical energy. When our cars burn gasoline in their engines, it is converted into motion and heat. When energy changes forms, energy is conserved.

Does the response "They both cause motion" correctly answer the question "What do wood and gasoline have in common?"?

OPTIONS:
- no
- yes
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Output: no

Have you are burned something on the stove or in the oven? Do you know why things burn? It all has to do with temperature. Changes in matter are affected by temperature. For example, what if you place a cake in the oven and you leave it in too long? What do you think will happen? Thats right, it will probably burn. The same thing will happen if the oven setting is too high and you apply too much heat. In either case, heat has affected the rate of change in matter. Its probably obvious that when the temperature is increased a chemical change, like cooking, will occur faster. What about a physical change? Are physical changes affected by temperature? Most of us have seen steam rising off a wet road after a summer rainstorm. This happens because the road surface is very warm. The warm road and warm air temperature causes the water to evaporate quickly. The liquid water is turning into water vapor, but it is still water. The evaporation of water is a physical change. So yes, temperature affects the rate that physical change occurs.

Question: "What kind of changes can be caused by temperature?"

OPTIONS:
- no
- yes

Answer: "Chemical changes"

Response: yes

The Agencies Confer When they learned a second plane had struck the World Trade Center, nearly everyone in the White House told us, they immediately knew it was not an accident. The Secret Service initiated a number of security enhancements around the White House complex. The officials who issued these orders did not know that there were additional hijacked aircraft, or that one such aircraft was en route to Washington. These measures were precautionary steps taken because of the strikes in New York. The FAA and White House Teleconferences. The FAA, the White House, and the Defense Department each initiated a multiagency teleconference before 9:30. Because none of these teleconferences-at least before 10:00- included the right officials from both the FAA and Defense Department, none succeeded in meaningfully coordinating the military and FAA response to the hijackings. At about 9:20, security personnel at FAA headquarters set up a hijacking teleconference with several agencies, including the Defense Department. The NMCC officer who participated told us that the call was monitored only periodically because the information was sporadic, it was of little value, and there were other important tasks. The FAA manager of the teleconference also remembered that the military participated only briefly before the Pentagon was hit. Both individuals agreed that the teleconference played no role in coordinating a response to the attacks of 9/11. Acting Deputy Administrator Belger was frustrated to learn later in the morning that the military had not been on the call. At the White House, the video teleconference was conducted from the Situation Room by Richard Clarke, a special assistant to the president long involved in counterterrorism. Logs indicate that it began at 9:25 and included the CIA; the FBI; the departments of State, Justice, and Defense; the FAA; and the White House shelter. The FAA and CIA joined at 9:40. The first topic addressed in the White House video teleconference-at about 9:40-was the physical security of the President, the White House, and federal agencies. Immediately thereafter it was reported that a plane had hit the Pentagon. We found no evidence that video teleconference participants had any prior information that American 77 had been hijacked and was heading directly toward Washington.

Question: "When did the video teleconference in the situation room begin?"

Response: "10:00am"
OPTIONS:
- no
- yes

A: no

Problem: Lash is associate dean at the University of Southern California Law School. Johnson is a justice on California's Second District Court of Appeal. Lash and Johnson are co-chairs of the California Commission on Access to Justice. The full report can be viewed at (www.calbar.org). In her year-long odyssey through the California justice system, Katherine, a 35-year-old single mother with three children, experienced failure at every turn. Leaving her abusive husband, she moved into the only apartment she could afford, and soon discovered a broken toilet and non- working oven, rats and roaches, and a fourthfloor landing with no railing. She began withholding rent pending repairs her landlord refused to make, but then her Medi-Cal benefits were cut off when she could not provide rent receipts. She lost health care for her children and herself, although she is a borderline diabetic in need of medication and her children were suffering from rat bites. Katherine tried to seek help through the courts. Representing herself at an administrative hearing, she lost her appeal to restore Medi-Cal benefits because she did not have proper documentation of the rent account. When she went to a courthouse to file a complaint against her landlord, she found the process so confusing that she gave up and went home. According to "The Path to Justice: A Five-Year Status Report on Access to Justice in California," prepared by the California Commission on Access to Justice, Katherine is just one of 4.6 million poor Californians whose basic civil legal needs -- often involving such critical needs as housing, health care, education, employment, safety and transportation -- are not being addressed. California has a critical dearth of legal services for the poor, and, as this report makes clear, it is imperative that the state join with the federal government and private funders to increase resources so that all Californians, regardless of income, have equal access to our justice system. Our justice system is predicated on the assumption that both parties will be represented by lawyers who act as gatekeepers and guides through a complex legal system that would otherwise be inaccessible to many of us. Unfortunately, the most vulnerable members of our society are the least able to afford legal services. California does have a strong network of legal aid organizations that try to help meet the needs of the poor, but there's just one legal aid lawyer available per 10,000 poor people. We may promise "justice for all," but for those who can't afford a lawyer, that promise is often a lie. In its new report, the Commission on Access to Justice notes some significant steps toward providing equal access to justice for all Californians.

Question: "What repairs or issues caused Katherine to withhold rent?"

Answer: "Katherine withheld rent because she felt she deserved new carpeting and a garbage disposal in her apartment"

OPTIONS:
- no
- yes
Answer: no

What if two children push a swing at the same time? Would the swing go higher? Yes, together their force would be more. It is common for forces to be combined. Most objects on Earth have at least two forces acting on them. Do you know what one of them is? Of course, that force is gravity. How many forces do you have on you right now? Gravity pulls you down toward the center of Earth. Your legs exert a downward force. They hold you up against the pull of gravity. Consider the example in Figure 1.3. A book is resting on a table. Gravity pulls the book downward. It has a force of 20 newtons. At the same time, the table pushes the book upward. Its force is also 20 newtons. The table opposes the pull of gravity.

Question: "What part of one's body can hold them up against the force of gravity?"

Response: ""Legs""
OPTIONS:
- no
- yes

A:
yes