Problem: Background: A vapor light also produces visible light by electroluminescence The bulb contains a small amount of solid sodium or mercury as well as a mixture of neon and argon gases. When an electric current passes through the gases, it causes the solid sodium or mercury to change to a gas and emit visible light. Sodium vapor lights, like the streetlight pictured in the Figure below , produce yellowish light. Mercury vapor lights produce bluish light. In addition to lighting city streets, vapor lights are used to light highways and stadiums. The bulbs are very bright and long lasting so they are a good choice for these places. Paragraph: Joey just purchased two new vapor light bulbs for his apartment and is excited to install them since they glow neat colors. He is going to install a different bulb in each room to give different colored glows to the rooms and to make his apartment seem more dynamic. In his bedroom he has decided to install a bulb that gives off a blue glow. He also picked up a bulb that glows yellow and will be putting that in his closet. However, after screwing the bulbs in, only the one in his closet glows, and Joey is not sure why. Given the paragraph above, please answer correctly the following question: Is the bulb in the closet or bedroom filled with sodium?

A: closet

Problem: Background: Farsightedness, or hyperopia, is the condition in which distant objects are seen clearly, but nearby objects appear blurry. It occurs when the eyeball is shorter than normal (see Figure below ). This causes images to be focused in a spot that would fall behind the retina (if light could pass through the retina). Hyperopia can be corrected with convex lenses. The lenses focus images farther forward in the eye, so they fall on the retina instead of behind it. Paragraph: Two people went to the eye doctor's office for an annual exam; James had farsightedness, while Bob had myopia. Given the paragraph above, please answer correctly the following question: Which person had to wear convex lenses?

A: James

Problem: Background: East Antarctica is colder than its western counterpart because of its higher elevation. Weather fronts rarely penetrate far into the continent, leaving the centre cold and dry. Despite the lack of precipitation over the central portion of the continent, ice there lasts for extended periods. Heavy snowfalls are common on the coastal portion of the continent, where snowfalls of up to 1.22 metres (48 in) in 48 hours have been recorded. Paragraph: Two scientists went to Antarctica for research. Tim was assigned to East Antarctica, while John was assigned to West Antarctica. They spent 6 months there. Given the paragraph above, please answer correctly the following question: Which scientist experienced colder weather?

A: Tim

Problem: Background: Human beings invented agriculture about 10,000 years ago. This provided a bigger, more dependable food supply. It also allowed people to settle down in villages and cities for the first time. Birth rates went up because there was more food and settled life had other advantages. Death rates also rose because of crowded living conditions and diseases that spread from domestic animals. Because the higher birth rates were matched by higher death rates, the human population continued to grow very slowly. Paragraph: A team of archaeologists studied two human settlements, village Alpha from about 11000 years ago and village Beta, which existed 9000 years ago. Village Beta was bigger, because their inhabitants already knew about and practiced agriculture. Given the paragraph above, please answer correctly the following question: Which village had smaller death rates because of crowded living conditions?

A:
Alpha