Question:
Sound waves are mechanical waves. They can travel only through matter. They cannot travel through empty space. This was demonstrated in the 1600s by a scientist named Robert Boyle. Boyle placed a ticking clock in a sealed glass jar. The clock could be heard ticking through the air and glass of the jar. Then Boyle pumped the air out of the jar. The clock was still running, but the ticking could not be heard. Thats because the sound couldnt travel without air particles to transfer the sound energy. Is there any other place where sound cannot be heard? Here is a hint: is there any other place that does not have air molecules? Thats right, in space sound cannot be transferred. So can astronauts hear each other? Yes, they can, because they are in enclosed space stations or pressurized suits.In both cases, they are surrounded by air molecules. If they left their space ship and did not use their electronics, they would not be able to hear each other. Next time you watch a science fiction movie, think about this factoid. When spaceships are destroyed by hostile alien beings, there would be no sound heard. Sound waves can travel through many kinds of matter. After reading the above, is "Aristotle" the correct answer to the question "Who demonstrated that sound could not travel through empty space, but only matter?"?

Answer:
no

Question:
Rough surfaces create more friction than smooth surfaces. Thats why cars have tires. Its also why we use rubber mats in areas that might get wet. In your bathtub, you may even use No-Slip tape. No-slip is another way of saying the items has a lot of friction. In Figure 1.9, the blades of the skates are very smooth. Thats why you cant slide across ice with shoes. The soles of your shoes are much rougher than skates. The rougher surface of shoes causes more friction and slows you down. Heavier objects also have more friction. A heavy object presses down with more force. The surfaces are held together more tightly. This makes the surfaces harder to slide past each other. Did you ever try to push something heavy across the floor? Heavy objects are much harder to push than light objects. After reading the above, is "Beacause, Rough surfaces create more friction than smooth surfaces" the correct answer to the question "Why do cars have tires?"?

Answer:
yes

Question:
The only home Hamilton ever owned was a Federal style mansion designed by John McComb Jr., which he built on his 32-acre country estate in Hamilton Heights in upper Manhattan. He named the house, which was completed in 1802, the "Grange" after his grandfather Alexander's estate in Ayrshire, Scotland. The house remained in the family until 1833 when his widow sold it to Thomas E. Davis, a British born real estate developer, for $25,000. Part of the proceeds were used by Eliza to purchase a new townhouse from Davis (Hamilton-Holly House) in Greenwich Village with her son Alexander. The Grange, first moved from its original location in 1889, was moved again in 2008 to a spot in St. Nicholas Park on land that was once part of the Hamilton estate, in Hamilton Heights, a neighborhood in upper Manhattan. The historic structure was restored to its original 1802 appearance in 2011, and is maintained by the National Park service as Hamilton Grange National Memorial. Alexander Hamilton served as one of the first trustees of the Hamilton-Oneida Academy in New York state. Later the Academy received a college charter in 1812, and the school was formally renamed Hamilton College.Columbia University, Hamilton's alma mater, has official memorials to Hamilton on its campus in New York City. The college's main classroom building for the humanities is Hamilton Hall, and a large statue of Hamilton stands in front of it. The university press has published his complete works in a multivolume letterpress edition. Columbia University's student group for ROTC cadets and Marine officer candidates is named the Alexander Hamilton Society. After reading the above, is "87 years" the correct answer to the question "How many years did the Grange house remain in the family?"?

Answer:
no

Question:
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. After reading the above, is "Water" the correct answer to the question "Besides rocks, what else do geologists study to find clues to make sense of past events?"?

Answer:
no