Problem: Surely, you have noticed the tall poles along the roadside. Do you know what is on top of those poles? Thats right, wires that carry electric current. These wires carry electric current to your home. But what is electric current? Electric current is actually the flow of electrons. You may recall, an electron is the outer-most particle in an atom. They have a negative charge. Electricity is the continuous flow of these particles. Electrons are able to move through wires. Their speed can even be measured. The SI unit for electric current (or speed) is the ampere (A). Ampere is often shortened to amp. Electric current may flow in just one direction, or it may keep reversing direction. Direct current (DC) flows in only one direction. Direct current is what is used in devices like flashlights. Alternating current (AC) flows in two directions. This is the type of current that flows into your home through wires.

Question: "What kind of charge does an electron have?"

Answer: "A negative charge"

OPTIONS:
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- yes
Answer: yes

Problem: Density is also an important physical property of matter. The concept of density combines what we know about an objects mass and volume. Density reflects how closely packed the particles of matter are. When particles are packed together more tightly, matter is more dense. Differences in density of matter explain many phenomena. It explains why helium balloons rise. It explains why currents such as the Gulf Stream flow through the oceans. It explains why some things float in or sink. You can see this in action by pouring vegetable oil into water. You can see a colorful demonstration in this video.

Question: "What is density?"

Answer: "The repelling of particles"

OPTIONS:
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Answer: no

Problem: Thelma James was a prime candidate for a real estate ripoff: She is 68, has precious little money and can't read or write. "I won't lie to you. I was so-o-o excited," the widow and former duplex dweller said of the purchase of her first home, a sagging frame structure on Snowden. "I was glad to get me a house." When James realized she had been swindled she turned to Memphis Area Legal Services, which represented her in a lawsuit. Now, James's monthly house notes have dropped from $796 - more than twice her monthly income - to an affordable $247. Some of the people who took advantage of her through a questionable loan program were sent to jail. "I don't know what I would have done without Legal Services," said James. "They solved a lot of my problems." James is one of more than 3,000 clients served last year by MALS, which provides assistance for civil matters, such as domestic abuse and family-related problems, Social Security and Supplemental Security Income, veterans, housing and consumer fraud cases. Like James, most clients are elderly or female. Some are handicapped. Some need medical care or veteran's benefits. Some are trying to escape eviction or an abusive marriage. And 87 percent live at or below poverty level. Shelby County Mayor A C Wharton recently said Legal Services is important for those who, because of poverty or other struggles in life, think justice is an empty word. "They must be given reason to believe that the law is for them too," said Wharton, a former executive director of MALS. But MALS faces a funding crunch next year, brought on by a $200,000 shortfall from three revenue sources.

Question: "How does James fit into the usual clientele of MALS?"

Answer: "She is handicapped"

OPTIONS:
- no
- yes
Answer:
no