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.
What question would one ask from this paragraph?
Answer: How did Robert Boyle prove the properties of sound waves?

The idea that Earth is a magnet is far from new. It was first proposed in 1600 by a British physician named William Gilbert. Knowing it acts like a magnet is one thing. Knowing why it acts like a magnet is more difficult. In fact, finding out why is a fairly recent discovery. To find out why required new technology. It was the seismograph that made it possible to learn why the Earth acted like a magnet. Seismograph are used to study earthquakes. By studying earthquake waves they were able to learn about Earths interior. They discovered that Earth has an inner and outer core. The outer core consists of liquid metals, mainly iron and nickel. Scientists think that Earths magnetic field is generated here. It is caused by the motion of this liquid metal. The liquid metal moves as Earth spins on its axis.
What question would one ask from this paragraph?
Answer: What do we know and don't about the Earth and magnets?

ATLANTA, Georgia (CNN) -- On a plot of soil, nestled against the backdrop of skyscrapers in downtown Atlanta, Georgia, a group of residents are turning a lack of access to fresh produce into a revival of old traditions and self-empowerment. Urban farming is a way for African-Americans to connect with the earth, says Cashawn Myers of HABESHA. HABESHA Gardens is one of many urban gardens sprouting up around the country. Fruits and vegetables are thriving in this community garden located in an economically depressed area of the city known as Mechanicsville. But the garden serves an even greater purpose. The harvest helps feed some of the neediest members of the neighborhood. "It's a reawakening going on. It's almost like it's a renaissance," says Cashawn Myers, director of HABESHA Inc. "There's a Ghanaian proverb that says Sankofa. Sankofa means return to your past so you can move forward. Even if you look at coming over here during our enslavement, we were brought here to cultivate the land because that's something we did on the continent. So really, that's what many of the people are doing now," he said. Myers believes urban farming is a way for many African-Americans to reconnect with their past. iReport.com: Show us your urban farm "They are going through a process of Sankofa and going to what they traditionally did, which is connect to the Earth so they can move forward and grow," he says. But HABESHA Gardens isn't unique. Former pro basketball player Will Allen, who is considered to be one of the nation's leading urban farmers and founder of Growing Power Inc., estimates that there are hundreds of thousands of urban gardens in inner cities across America. Urban farms help feed people, sustain neighorhoods " "It's beyond a movement at this point. Its more like a revolution," says Allen.
What question would one ask from this paragraph?
Answer: How does a Ghanaian proverb relate to urban farming?

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 .
What question would one ask from this paragraph?
Answer:
What was the shape of the urn, what were the specific artifacts were found in it and who did they belong too?