Article: Just as the world's most respected scientific bodies have confirmed that the world is getting hotter, they have also stated that there is strong evidence that humans are driving the warming. Countless recent reports from the world's leading scientific bodies have said the same thing. For example, a 2010 summary of climate science by the Royal Society stated that: "There is strong evidence that the warming of the Earth over the last half-century has been caused largely by human activity." The idea that humans could change the planet's climate may be counter-intuitive , but the basic science is well understood. Each year, human activity causes billions of tons of greenhouse gases to be released into the atmosphere. As scientists have known for years, these gases hold heat that would otherwise escape to space, wrapping the planet in an invisible blanket. Of course, the planet's climate has always been changing thanks to "natural" factors such as changes in solar or volcanic activity, or cycles relating the Earth's going around the sun. According to the scientific literature, however, the warming recorded to date matches the pattern of warming we would expect from a build-up of greenhouse gas in the atmosphere - not the warming we would expect from other possible causes. Even if scientists did discover another reasonable explanation for the warming observed so far, that would beg a difficult question. As Robert Henson puts it in The Rough Guide to Climate Change: "If some newly discovered factor can account for the climate change, then why aren't carbon dioxide and the other greenhouse gases producing the warming that basic physics tells us they should be?" The only way to prove with 100% certainty that humans are responsible for global warming would be to run an experiment with two _ Earths - one with human influence and one without. That obviously isn't possible, and so most scientists are careful not to state human influence as an certainty. Question: The underline word "identical" means _ . Yes or no, is the answer "exactly the same"?
Yes

(Question)
Article: If you look at the night sky, you'll often see stars moving very quickly. In fact, they move much more quickly than they should according to their size and the laws of physics. Scientists do not completely understand why the speed of these stars is so high. But many believe the reason is that much of the universe is made of something called "dark matter". Groups of stars called galaxies, such as the Milky Way, might even be made up of 90 percent dark matter. How much something weighs depends on where it is. The same object weighs only half as much on Mars as it does on Earth and almost three times as much on Jupiter. So scientists prefer to talk about the mass of something rather than how much it weighs, because mass does not change. They can work out the mass of galaxies by measuring the distance between them and the speed they move at. Recently, Jorge Penarrubia, a senior academic at Edinburgh University, UK, and his team discovered something interesting: The mass of the Milky Way is only half as much as the mass of another nearby galaxy, Andromeda. This seems strange, and dark matter may explain why. Finding out more about dark matter could help us understand how the universe began, but this is not easy. Lots of scientists with different types of expert knowledge are working on the problem. We can't see dark matter, it's very difficult to measure and we can't find out its mass. Unlike stars, dark matter doesn't produce or reflect light. But we can make a good guess that it is there because of the way things move and the way light bends. Experts now think dark matter may be very different from the matter that we find on Earth. There may also be five times as much dark matter in the universe as ordinary matter. Question: Something that weighs 15kg on Earth weighs about _ on Mars and _ on Jupiter. Yes or no, is the answer "7.5 kg; 45 kg"?
(Answer)
Yes

Ques: Article: Scientists have proved that sleeping and learning go hand in hand. Even a short nap can boost our memory and sharpen our thinking. But the relationship goes deeper than that. "The brain is not passive while you sleep," scientist Anat Arzi said. "It's quite active. You can do many things while you are asleep." Arzi and her coworkers didn't try to teach the sleeping volunteers any complex information, like new words or facts. Instead, the scientists taught volunteers to make new connections between smells and sounds. When we smell something good, like a flower, we take deep breaths. When we smell something bad, we take short breaths. Arzi and her co-workers based their experiment on these reactions. Once the volunteers fell asleep in the lab, the scientists went to work. They gave them a whiff of something pleasant and meanwhile played a particular musical note. They didn't wake up, but they heard--and sniffed deeply. Then the scientists gave the volunteers a whiff of something terrible and played a different musical note. Again, the volunteers heard and smelled--a short snort this time--but didn't wake up. The researchers repeated the experiment. After just four repetitions, volunteers made a connection between the musical notes and their paired smells. When the scientists played the musical tone that went with good smells, the sleepers breathed deeply. And when the scientists played the musical tone that went with bad smells, the sleepers breathed briefly--despite there being no bad smell. The next day, the volunteers woke up with the sound-smell connection. They breathed deeply when hearing one tone and cut their breaths short when hearing the other, which must have been unusual for them. Imagine walking down the street and taking a deep breath upon hearing a particular sound! Question: When the volunteers woke up the next day, they _ . Yes or no, is the answer "continued with the sound-smell connection"?
Ans: No

Article: Have you winterized your horse yet? Even though global warming may have made our climate more mild, many animals are still hibernating .It's too bad that humans can't hibernate. In fact, as a species, we almost did. Apparently, at times in the past , peasants in France liked a semi-state of human hibernation . So writes Graham Robb, a British scholar who has studied the sleeping habits of the French peasants. As soon as the weather turned cold people all over France shut themselves away and practiced the forgotten art of doing nothing at all for months on end. In line with this, Jeff Warren, a producer at CBC Radio's The Current, tells us that the way we sleep has changed fundamentally since the invention of artificial lighting and the electric bulb. When historians began studying texts of the Middle Ages, they noticed something referred to as "first sleep", which was not clarified, though. Now scientists are telling us our ancestors most likely slept in separate periods. The business of eight hours' uninterrupted sleep is a modern invention. In the past , without the artificial light of the city to bathe in, humans went to sleep when it became dark and then woke themselves around midnight. The late night period was known as "The Watch" It was when people actually kept watch against wild animals ,although many of them simply moved around or visited family and neighbours . According to some sleep researchers, a short period of insomnia at midnight is not a disorder .It is normal . Humans can experience another state of consciousness around their sleeping, which occurs in the brief period before we fall asleep or wake ourselves in the morning .This period can be an extraordinarily creative time for some people .The impressive inventor, Thomas Edison , used this state to hit upon many of his new ideas. Playing with your sleep rhythms can be adventurous ,as anxiety may set in. Medical science doesn't help much in this case. It offers us medicines for a full night's continuous sleep, which sounds natural ;... Question: What is the author's purpose in writing the passage? Yes or no, is the answer "To throw new light on human sleep."?
No