Problem: You know that friction also causes heat. Think about when you rub your hands together. It is friction that makes them warm. But why does this happen? Friction causes the molecules on rubbing surfaces to move faster. Faster moving particles have more heat energy. Heat from friction can be useful. Can you think of other places where you might find friction? Friction also lets you light a match. Heat from friction can also cause problems. It can cause a car to overheat. To reduce friction, oil is added to the engine. Oil coats the surfaces of moving parts. This coating of oil makes them slippery. When things are slippery there is less friction. Have you ever seen a sign that says, slippery when wet? This too has to do with friction. Water, like oil, can reduce friction. The wet surface may allow your shoes to slide more easily.

Question: "Why do rubbing your hands make them warm?"

Answer: "From mechanical reaction"
Answer: no

Problem: When land is cleared, habitats are lost. It may be cleared for agriculture. It may also be used for building new homes or businesses. Within the past 100 years, the amount of land used for agriculture has almost doubled. Land used for grazing cattle has more than doubled. Many wetlands have also been lost to agriculture. The U.S. has lost almost all the natural tall-grass prairies. Thee areas of tall thick grass have virtually disappeared. These areas of land had thick fertile soil. Their grasses had very deep root systems. These deep and thick roots reduced the amount of soil erosion. They also were home to many plants and animals. Prairies were wonderful places. They were home to colorful flowers, prairie dogs, and herds of bison.

Question: "In the last 100 years, how much has the agricultural clearing grown and how is it used?"

Answer: "Selling land"
Answer: no

Problem: The film begins with members of the Catholic Church digging up the body of a 19th century church official , whose casket has a box-shaped urn chained to it . Inside the box they discover artifacts belonging to Mater Lachrymarum , the last surviving member of the Three Mothers ; an ancient trio of powerful black witches . In particular , the box contains a magic cloak that , when worn by Mater Lachrymarum , increases her powers significantly . The urn is shipped to the Museum of Ancient Art in Rome , where Sarah Mandy , an American studying art restorationworks . Sarah is dating the curator Michael Pierce , a single father who is away from the museum that night . With help from the assistant curator , Sarah opens the box and finds the cloak , a dagger , and three statues representing the three witches . Sending Sarah to her office to retrieve tools to help her translate the text on the artifacts , the curator is promptly attacked by the demonic agents of Mater Lachrymarum . Sarah arrives too late to save her boss and starts to flee the museum . Unfortunately , she is pursued by Mater Lachrymarum 's familiar and is only able to escape when a disembodied voice magically throws open a series of locked doors keeping her trapped inside the museum . Sarah tells the police what happened as she spends the night with Michael and his son . Michael visits the Cardinal who sent him the urn only to find out that , shortly after mailing the urn to him , he had a severe stroke and is now in a coma .

Question: "What was the shape of the urn, what were the specific artifacts were found in it and who did they belong too?"

Answer: "Sarah"
Answer:
no