首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Reading According to the controversial sunspot theory, great storms on the surface of the Sun hurl streams of solar particles in
Reading According to the controversial sunspot theory, great storms on the surface of the Sun hurl streams of solar particles in
admin
2018-06-21
58
问题
Reading
According to the controversial sunspot theory, great storms 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 grains 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. They have been observed in arrangements of one to more than one hundred spots, but they tend to occur in pairs. There is also a marked tendency for the two spots of a pair to have opposite magnetic polarities. Furthermore, the strength of the magnetic field associated with any given sunspot is closely related to the spot’s size.
Sunspots have also been observed to occur in cycles, over a period of eleven years. At the beginning of a cycle, the storms occur between 20 and 40 degrees north and south of the equator on the Sun. As the cycle continues, some of the storms move closer to the equator. As the cycle diminishes, the number of sunspots decreases to a minimum, and they cluster between 5 and 15 degrees north and south latitude.
Although there is no theory that completely explains the nature and function of sunspots, several models show scientists’ attempts to relate the phenomenon to magnetic field lines along the lines of longitude from the north and south poles of the Sun.
How can we describe the effect of matter from the Sun that enters the Earth’s atmosphere^
选项
A、It causes volcanic eruptions on the surface of the Earth.
B、It affects changes in the weather patterns on Earth.
C、It results in shadows across the Earth’s surface.
D、It produces higher temperatures on the Earth.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/XDfO777K
0
托福(TOEFL)
相关试题推荐
Whatinformationwasgivenbyeachwriter?ChooseyouranswersfromtheboxandwritethelettersA-FnexttoQuestions24-27.A
Whatdoeseachuniversityfacilityhave?ChooseyouranswersfromtheboxandwritethecorrectletterA-GnexttoQuestions24-
Whatdoeseachuniversityfacilityhave?ChooseyouranswersfromtheboxandwritethecorrectletterA-GnexttoQuestions24-
ChooseTWOletters,A-E.WhatTWOthingsdoBradandHelenagreetosayaboutlisteningingroups?AListeningskillsareoften
Completetheflowchartbelow.ChooseFIVEanswersfromtheboxandwritethecorrectletter,A-G,nexttoquestions26-30.AId
Labeltheplanbelow.Writethecorrectletter,A-l,nexttoquestions16-20Whereinthemuseumarethefollowingplaces?Gal
Completethenotesbelow.WriteNOMORETHANTWOWORDSAND/ORANUMBERforeachanswerENVIRONMENTALCHANGEDISCUSSIONInSouthe
Choosethecorrectletter,A,BorC.GENERALCOURSEDETAILSWhoareinterestedinMicrobiologycourses?
ENDANGEREDSPECIESAlthoughwecannotdoanythingabouttheplantsandanimalsthatarealready【31】________,wecandosomething
AustralianAboriginalArtAncientartrockandbarkpaintingsanddrawings【L31】______________decorationso
随机试题
DSA检查的适应证不包括
某甲因涉嫌某故意杀人案,由人民检察院提起公诉,人民法院决定受理,并定于某日开庭审判。在开庭当日,某甲在押送途中脱逃,致使案件在较长时间无法继续审理,则对于此案的处理做法符合刑事诉讼法相关规定的是:
环境影响评价范围应包括开发区、()以及开发建设直接涉及的区域(或设施)。
在自营账户的审核和稽核制度中,以下()不属于禁止行为。
当前,我国学校德育内容主要包括政治教育、思想教育、道德教育和()。
某同学经韦克斯勒儿童智力量表测试,其智商为120。则对应的71分数为()。
以下有关搜索引擎的说法,不正确的是()。
结构化程序设计主要强调的是______。
Obesity:theScourgeoftheWesternWorldObesityisrapidlybecominganewscourgeofthewesternworld,delegatesagreeda
Whenyouexchangee-mailwithsomeone,themessagessentbetweenyouandthatpersonpassthroughseveralcomputersbeforethey
最新回复
(
0
)