How can you describe your location? You might use a familiar system. You might say, 'I live at 1234 Main Street, Springfield, Ohio.' You could also say, 'I live right behind the Elementary School.' This method uses the school as a point of reference. Another example is, I am at the corner of Maple Street and Main Street. Both streets may be a good reference for anyone living in your town. Scientists must be able to pinpoint a feature they are studying. Scientists use a special system to describe locations. They use latitude and longitude as a reference. Lines of latitude and longitude form a grid. You may have used a grid system while doing graphing. This grid is centered on a reference point. Zero latitude is the equator. Lines of latitude run east to west. They divide the Earth from North to South. Lines of longitude run from north to south. They divide the Earth from East to West. Zero longitude runs through Greenwich, England. You may have heard the term, Greenwich Mean Time, or GMT. The system of latitude and longitude works well for objects that do not move.

Question: "Would a line of latitude that runs through Greenwich, England, divide the Earth from north to south or from east to west?"

Response: "North to South"
OPTIONS:
- no
- yes

A: no

When 74-year-old Penny Sweat was evicted from the HUD-subsidized Glendale Senior Housing in Salt Lake City last month, she moved to a nonsubsidized apartment at five times her previous rent because she was unaware of her rights. It turns out the manager of the seniors complex, its attorneys and government overseers were unaware, too. Lee Kemp, a hearing-impaired World War II disabled vet, also was evicted, but he contacted Utah Legal Services and was told to stay put. Attorney Marty Blaustein then notified Utah Nonprofit Housing Corp., the building's owner, that Kemp's eviction was not legal and that he had a right to a hearing. That didn't stop Utah Nonprofit Housing's attorneys from then sending Kemp a summons to show cause why he had not moved out. Meanwhile, Sweat's granddaughter called Salt Lake City housing officials, federal housing officials, state officials and several agents of Utah Nonprofit Housing to find out about her grandmother's rights. Nobody knew. Blaustein then took Sweat's case along with Kemp's and demanded her ousting be rectified. Utah Nonprofit Housing President Marion Willey returned from an out-of-town trip and learned HUD procedures were not followed. The eviction was activated because of ongoing personality conflicts among seniors in the complex, he said, and the new building manager decided the problems were with Sweat and Kemp. Several tenants blame other neighbors as perpetrators of the rift, however. Willey said when his building manager called attorneys retained by the company, they erroneously told her she could go ahead and kick out the tenants. When she called HUD to make sure, the inquiry got bogged down in bureaucracy and nobody called her back. Willey says he has offered Sweat and Kemp apartments in another complex operated by his company at their old rates. He also is retaining new attorneys.

Question: "Who knew what Penny's rights were?"

Response: "Penny"
OPTIONS:
- no
- yes

A: no

Physical properties include the state of matter. We know these states as solid, liquid, or gas. Properties can also include color and odor. For example, oxygen is a gas. It is a major part of the air we breathe. It is colorless and odorless. Chlorine is also a gas. In contrast to oxygen, chlorine is greenish in color. It has a strong, sharp odor. Have you ever smelled cleaning products used around your home? If so, you have probably smelled chlorine. Another place you might smell chlorine is at a public swimming pool. The chlorine is used to kill bacteria that may grow in the water. Other physical properties include hardness, freezing, and boiling points. Some substances have the ability to dissolve in other substances. Some substances cannot be dissolved. For example, salt easily dissolves in water. Oil does not dissolve in water.

Question: "Why is chlorine used in our everyday lives and how?"

Response: "kill bacteria"
OPTIONS:
- no
- yes

A:
yes