Electric charge is a physical property. It occurs between particles or objects. It causes them to attract or repel each other. They do not even have to touch. This is unlike the typical push or pull you may be familiar with. All electric charge is based on the protons and electrons in atoms. A proton has a positive electric charge. An electron has a negative electric charge. Forces on Charged Objects Most atoms are balanced electrically. They have the same number of positive and negative charges. Therefore, the number of protons equals the number of electrons. Neutrons do not matter as they have no charge. When an object loses some electrons, it becomes positively charged. There are now more protons than electrons inside the atom. The lost electrons may remain free. Or, they may attach to another object. The new object now has more electrons than protons. It then becomes negatively charged.
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QUESTION: If a particle loses some of its protons, what is the particle's charge?

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.
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QUESTION: Who called HUD to make sure she was allowed to kick out the tenants?

Living things need non-living matter as well as energy. What do you think matter is used for? One thing is to build bodies. They also need it to carry out the processes of life. Any non-living matter that living things need is called a nutrient. Carbon and nitrogen are examples of nutrients. Unlike energy, matter is recycled in ecosystems. You can see how in Figure 3.11. Decomposers release nutrients when they break down dead organisms. The nutrients are taken up by plants through their roots. The nutrients pass to primary consumers when they eat the plants. The nutrients pass to higher level consumers when they eat lower level consumers. When living things die, the cycle repeats.
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QUESTION: What is one thing non-living matter used for?

Have you ever looked closely at a globe? That continents look like a giant jig-saw puzzle. North America looks like it could fit next to Europe. The edge of South America matches Africa. Scientists noticed these same features. It caused them to start asking questions. They wanted to know if these continents were was connected? If so, how can something so large move so far? What could possibly have enough force to move such a giant slab of rock? Is there other evidence that can provide clues to the past positions of continents? How can answering these questions help us? A scientist named Alfred Wegener had these same questions. Wegener look at rocks on both sides of the Atlantic Ocean. He noticed they were the same type and age. He thought that the rocks must have formed side by side. He proposed that the rocks then drifted apart. One part went with North America. The other part stayed with Europe.
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QUESTION:
He proposed that the rocks formed side by side and then drifted where?