Problem: It is not enough to describe some objects by their location. We may also need to know its direction. For example, a wind blows a storm over your school. Where is that storm coming from? Where is it going? How can we describe a direction? The most common way is by using a compass. A compass is a device with a floating needle (Figure 2.1). The needle is a small magnet. The needle aligns itself with the Earth's magnetic field. The compass needle always points to magnetic north. If you have a compass and you find north. You can then know any other direction. See the directions, such as east, south, west, etc., on a compass rose. The Earth has two poles. It has a magnetic north pole. It also has a geographic north pole. These two poles are close to each other but not the exact same place. 

Question: "What are the earth's two poles?"

Answer: "North pole"
Answer: no

Problem: The new administration had already begun exploring possible diplomatic options, retracing many of the paths traveled by its predecessors.U.S. envoys again pressed the Taliban to turn  Bin Laden "over to a country where he could face justice" and repeated, yet again, the warning that the Taliban would be held responsible for any al Qaeda attacks on U.S. interests. The Taliban's representatives repeated their old arguments. Deputy Secretary of State Richard Armitage told us that while U.S. diplomats were becoming more active on Afghanistan through the spring and summer of 2001, "it would be wrong for anyone to characterize this as a dramatic shift from the previous administration." In deputies meetings at the end of June, Tenet was tasked to assess the prospects forTaliban cooperation with the United States on al Qaeda. The NSC staff was tasked to flesh out options for dealing with the Taliban. Revisiting these issues tried the patience of some of the officials who felt they had already been down these roads and who found the NSC's procedures slow." We weren't going fast enough,"Armitage told us. Clarke kept arguing that moves against the Taliban and al Qaeda should not have to wait months for a larger review of U.S. policy in South Asia." For the government," Hadley said to us,"we moved it along as fast as we could move it along." As all hope in moving the Taliban faded, debate revived about giving covert assistance to the regime's opponents. Clarke and the CIA's Cofer Black renewed the push to aid the Northern Alliance. Clarke suggested starting with modest aid, just enough to keep the Northern Alliance in the fight and tie down al Qaeda terrorists, without aiming to overthrow the Taliban. Rice, Hadley, and the NSC staff member for Afghanistan, Zalmay Khalilzad, told us they opposed giving aid to the Northern Alliance alone. They argued that the program needed to have a big part for Pashtun opponents of theTaliban. They also thought the program should be conducted on a larger scale than had been suggested. Clarke concurred with the idea of a larger program, but he warned that delay risked the Northern Alliance's final defeat at the hands of the Taliban. During the spring, the CIA, at the NSC's request, had developed draft legal authorities-a presidential finding-to undertake a large-scale program of covert assistance to the Taliban's foes. 

Question: "The northern Alliance was an opponent of?"

Answer: "Al qaeda"
Answer: no

Problem: 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: "Is any matter created when you burn wood in a campfire?"

Answer: "No, because of conservation of mass"
Answer:
yes