Mechanical energy is a combination of the energy of motion or position. This type of energy describes objects that are moving or could move. A moving ball can have energy from motion. An arrow can also have the energy of motion. Both are types of mechanical energy. Can you think of some other examples? Where does the energy of motion come from? It comes from the energy created by position. This energy is stored energy. This means it is not moving yet, but it has the potential to move. How can you store energy? The arrow gains energy from the drawn bow. As the arrow is released, the bow releases its stored energy and puts the arrow into motion. Can you think of some other ways to store energy using position?
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QUESTION: What type of energy is created by position?

Two women trade houses without ever having met . They 're both looking for an escape from their problems , but by running away , both come to discover a great deal about themselves . Ria Lynch is married to Danny Lynch and they have a daughter and a son . Danny begins spending less and less time at home with his wife and children . Ria believes another baby is the solution , and is shocked to find out that indeed her husband is going to be a father - but to a child from an affair he has been having . Her husband's unfaithfulness is the event that leads Ria into her decision to switch homes with a woman from the US called Marilyn who lost her teenage son to a motorcycle accident on his birthday . Marilyn is struggling to come to terms with her son's death and has become estranged from her husband . She hopes her time in Dublin will cease her grief . Ria and Marilyn discover deep , dark secrets about the other during the summer . The two become close friends but do not reveal the secrets . { { Expand section } }
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QUESTION: Where will each of the women be living?

The Creed family moves into a new home , close to a road where truckers often drive unsafely . They befriend their neighbor , Jud Crandall , who tells them about a nearby pet cemetery which was built on Indian burial grounds and is rumored to be haunted . Later , Louis Creed , working at the University of Maine at Orono health center , treats Victor Pascow , who has been hit by a truck and incurred massive head injuries . Pascow dies after grabbing Louis , addressing him by name , and uttering a cryptic message . He also promises to '' come to '' him . That night , in what is seemingly a dream , Victor visits Louis , warning him about the burial ground beyond the pet cemetery . Louis wakes up to find his feet covered in dirt . Church , a cat owned by Louis ' daughter Ellie , is killed by a truck on the road in front of their house while Rachel , Ellie and Gage are in Chicago . Jud takes Louis to an ancient Micmac Indian burial ground beyond the pet cemetery they visited earlier and buries the cat . Church is brought back to life , but is an evil shell of himself . He attacks Louis and reeks of decomposition . Louis asks if a person was ever buried in the grounds . Jud replies , '' Christ on His throne , no. . And whoever would? '' Sometime later , Louis ' young son Gage is killed by a truck on the same road . Louis considers burying Gage in the burial grounds . Jud tries to dissuade him from doing so , telling him about a young man from town , Timmy Baterman , who died in service during World War II .
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QUESTION: What was the rumor about the pet cemetery that Victor warned Louis about?

Earth processes have not changed over time. The way things happen now is the same way things happened in the past. Mountains grow and mountains slowly wear away. The same process is at work the same as it was billions of years ago. As the environment changes, living creatures adapt. They change over time. Some organisms may not be able to adapt. They become extinct. Becoming extinct means they die out completely. Some geologists study the history of the Earth. They want to learn about Earths past. They use clues from rocks and fossils. They use these clues to make sense of events. The goal is to place things in the order they happened. They also want to know how long it took for those events to happen.
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QUESTION:
What purpose do rocks and fossils serve?