TAILIEUCHUNG - How to prepare for the foefl part 29

One of the best ways to support students who are fearful of speaking is to address the issue of confidence. Developing a positive atti¬tude toward the speaking tasks is a key to success on this section of the TOEFL. | 33. What is the author s main purpose in the passage 35 To propose a theory to explain sunspots X To describe the nature of sunspots To compare the umbra and the penumbra in sunspots E To argue for the existence of magnetic fields in sunspots 34. The word controversial in paragraph 1 is closest in meaning to widely accepted X open to debate 35 just introduced 35 very complicated Beginning According to the controversial sunspot theory great storms or eruptions on the surface of the sun hurl streams of solar particles into space and eventually into the atmosphere of our planet causing shifts in the weather on the Earth and interference with radio and television communications. A typical sunspot consists of a dark central umbra a word derived from the Latin word for shadow which is surrounded by a lighter penumbra of light and dark threads extending out from the center like the spokes of a wheel. Actually the sunspots are cooler than the rest of the photosphere which may account for their apparently darker color. Typically the temperature in a sunspot umbra is about 4000 K whereas the temperature in a penumbra registers 5500 K and the granules outside the spot are 6000 K. Sunspots range in size from tiny granules to complex structures with areas stretching for billions of square miles. About 5 percent of all sunspots are large enough so that they can be seen from Earth without instruments consequently observations of sunspots have been recorded for thousands of years. I I MODEL TEST 1 281 36. The word particles in paragraph I refers to 35 gas explosions in the atmosphere 35 light rays from the sun 35 liquid streams on the sun 35 small pieces of matter from the sun Beginning According to the controversial sunspot theory great storms or eruptions on the surface of the sun hurl streams of solar particles into space and eventually into the atmosphere of our planet causing shifts in the weather on the Earth and interference with radio and television communications. A .

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