The properties of matter depend on the types of atoms that matter is made of. Matter can exist in two forms. It can be a pure substance. This means it is not mixed with anything. It can also be a combination of different substances. This means it can be a mix of different types of atoms. You may recall that atoms differ based on the numbers of protons they contain. Some atoms contain only one proton such as Hydrogen. Other atoms contain many protons. There are many types of atoms. For example, Helium has two protons. An Oxygen atom has eight. Water is composed of a two types of atoms. Water is made of two Hydrogen atoms and one Oxygen atoms. There are only so many types of atoms. These atoms can be mixed into an almost limitless amount of substances. So what do we call a substance that has only a single type of atom?

Question: "How many more protons does Helium have than Hydrogen?"

Answer: "1. Hydrogen has only one proton, why Helium has 2 Protons. 2-1 =1"

Response: yes

Catherine V. "Ginny" Kilgore of Oxford, an attorney with North Mississippi Rural Legal Services, has been recognized for her dedication to serving the indigent. Kilgore - who oversees delivering legal services to the disabled and elderly in 39 north Mississippi counties - is recipient of the University of Mississippi School of Law's 2002 Public Service Award. The award was announced recently at a dinne r, held in Kilgore's honor and hosted by law school Dean Samuel M. Davis, who presented her with an engraved plaque. "Ginny Kilgore is a public servant in the truest sense," said Davis. "Her selection continues the tradition of this award in recognizing those who have labored in the trenches, with little or no compensation but with great professional and personal satisfaction in helping to bring justice and equality to those who need it most." "This award means a great deal to me," Kilgore said, pointing to others so honored. "The work of those who received the award before me has been so important; I feel very honored." After earning bachelor's and master's degrees in education and a few years teaching, Kilgore enrolled at the UM law school. Upon graduation in 1975, she entered private law practice in Oxford, joining NMRLS in 1978. Since then, she has earned promotions from managing attorney, senior attorney, then director of the Council on Aging project. Since 1990, she has worked in the Administrative Law Unit and Resource Development, and directed the Elder Law Project, serving the northern half of the state. She also is an adjunct professor in the UM law school's Civil Law Clinic. She held a similar post a few years ago in the school's Elder Law Clinic. Kilgore says she's found her niche. "I've always thought it was important to do work to help people. I really enjoy it. The issues I've dealt with through the years have been on the side of helping people maintain the basics of life - home, healt h care, jobs and family." She says her desire to serve others was sparked early, growing up in a single-parent home, aware that her widowed mother faced certain challenges as she supported her four children through public school and college.

Question: "What award was announced at a dinner held in Kilgore's honor?"

Answer: "Helmuth-James-von-Moltke-Preis"

Response: no

In architecture Durer cites Vitruvius but elaborates his own classical designs and columns. In typography, Durer depicts the geometric construction of the Latin alphabet, relying on Italian precedent. However, his construction of the Gothic alphabet is based upon an entirely different modular system. The fourth book completes the progression of the first and second by moving to three-dimensional forms and the construction of polyhedra. Here Durer discusses the five Platonic solids, as well as seven Archimedean semi-regular solids, as well as several of his own invention. In all these, Durer shows the objects as nets. Finally, Durer discusses the Delian Problem and moves on to the 'construzione legittima', a method of depicting a cube in two dimensions through linear perspective. It was in Bologna that Durer was taught (possibly by Luca Pacioli or Bramante) the principles of linear perspective, and evidently became familiar with the 'costruzione legittima' in a written description of these principles found only, at this time, in the unpublished treatise of Piero della Francesca. He was also familiar with the 'abbreviated construction' as described by Alberti and the geometrical construction of shadows, a technique of Leonardo da Vinci. Although Durer made no innovations in these areas, he is notable as the first Northern European to treat matters of visual representation in a scientific way, and with understanding of Euclidean principles. In addition to these geometrical constructions, Durer discusses in this last book of Underweysung der Messung an assortment of mechanisms for drawing in perspective from models and provides woodcut illustrations of these methods that are often reproduced in discussions of perspective.

Question: "What kind of solids does Durer discuss in his fourth book?"

Answer: "Semi-regular"

Response: yes

Tuesday, September 11, 2001, dawned temperate and nearly cloudless in the eastern United States. Millions of men and women readied themselves for work. Some made their way to the Twin Towers, the signature structures of the World Trade Center complex in New York City. Others went to Arlington, Virginia, to the Pentagon. Across the Potomac River, the United States Congress was back in session. At the other end of Pennsylvania Avenue, people began to line up for a White House tour. In Sarasota, Florida, President George W. Bush went for an early morning run. For those heading to an airport, weather conditions could not have been better for a safe and pleasant journey. Among the travelers were Mohamed Atta and Abdul Aziz al Omari, who arrived at the airport in Portland, Maine. Boston: American 11 and United 175. Atta and Omari boarded a 6:00 A.M. flight from Portland to Boston's Logan International Airport. When he checked in for his flight to Boston, Atta was selected by a computerized prescreening system known as CAPPS (Computer Assisted Passenger Prescreening System), created to identify passengers who should be subject to special security measures. Under security rules in place at the time, the only consequence of Atta's selection by CAPPS was that his checked bags were held off the plane until it was confirmed that he had boarded the aircraft. This did not hinder Atta's plans. Atta and Omari arrived in Boston at 6:45. Seven minutes later, Atta apparently took a call from Marwan al Shehhi, a longtime colleague who was at another terminal at Logan Airport. They spoke for three minutes. It would be their final conversation.

Question: "Who had their final conversation"

Answer: "Mohamed Atta"

Response:
yes