Problem: Background: When the temperature of reactants is higher, the rate of the reaction is faster. At higher temperatures, particles of reactants have more energy, so they move faster. As a result, they are more likely to bump into one another and to collide with greater force. For example, food spoils because of chemical reactions, and these reactions occur faster at higher temperatures (see the bread on the left in the Figure below ). This is why we store foods in the refrigerator or freezer (like the bread on the right in the Figure below ). The lower temperature slows the rate of spoilage.  Paragraph: Rob is a chemist with a pharmaceutical company. He is trying to devise a technique that would  be able to control chemical reactions. For that, he conducted two tests. In the first test, he used warmer reactants. He called it reactant A. In the second test, he used cooler reactants. He called it reactant B.  Given the paragraph above, please answer correctly the following question: In which reactants the particles would move faster, reactant A or reactant B?

A: reactant A


Problem: Background: Making these healthy lifestyle choices can also help prevent some types of cancer. In addition, you can lower the risk of cancer by avoiding carcinogens , which are substances that cause cancer. For example, you can reduce your risk of lung cancer by not smoking. You can reduce your risk of skin cancer by using sunscreen. How to choose a sunscreen that offers the most protection is explained below ( Figure below ). Some people think that tanning beds are a safe way to get a tan. This is a myth. Tanning beds expose the skin to UV radiation. Any exposure to UV radiation increases the risk of skin cancer. It doesn’t matter whether the radiation comes from tanning lamps or the sun.  Paragraph: Benny and Jerry were two Irish twins. They went to the doctor for their yearly exam. Benny found out he could get cancer because of his lifestyle so he decided to make healthy lifestyle choices from then on. Jerry continued smoking, spending lots of time in the sun, and eating junk-food.  Given the paragraph above, please answer correctly the following question: Which brother didn't lower the risk of getting lung cancer by quitting smoking?

A: Jerry


Problem: Background: For comparison,  sunlight on Saturn is slightly brighter than Earth sunlight at the average sunset or sunrise (see daylight for comparison table). Even on Pluto, the sunlight would still be bright enough to almost match the average living room. To see sunlight as dim as full moonlight on Earth, a distance of about 500 AU (~69 light-hours) is needed; there are only a handful of objects in the Solar System known to orbit farther than such a distance, among them 90377 Sedna and (87269) 2000 OO67.  Paragraph: John wanted to do a thought experiment. To that end, he started his journey under the full moonlight on Earth. He labeled that as time A. Then he entered his living room. He labeled that as time B. Next he traveled to Saturn. He labeled that as time C. After that, he traveled to Pluto. He labeled that as time D. Then he went to 90377 Sedna. He labeled that as time E. At the end, he returned back to Earth at sunset. He labeled that as time F.  Given the paragraph above, please answer correctly the following question: Would time A be more likely or less likely as bright as time E?

A: more likely


Problem: Background: Another possible benefit of aggregation is to protect against predation by group anti-predator behavior. Many species exhibit higher rates of predator vigilance behavior per individual at lower density. This increased vigilance might result in less time and energy spent on foraging, thus reducing the fitness of an individual living in smaller groups. One striking example of such shared vigilance is exhibited by meerkats. Meanwhile, other species move in synchrony to confuse and avoid predators such as schools of sardines and flocks of starlings. The confusion effect that this herding behavior would have on predators will be more effective when more individuals are present.Cooperative feeding  Paragraph: Two different types of animals live in the same habitat but have vastly different behaviors. Animals A and B are both the same size which is relatively small. Animal A lives in small groups of 4 or 5. Animal B however lives in very large groups and when they move around they all move at the same time. Both groups are also hunted by the same predator.  Given the paragraph above, please answer correctly the following question: Which group of animal is likely more fit, animal A of B?

A:
B