首页
登录
职称英语
[originaltext] Astronomers are still learning about sunspots and about their
[originaltext] Astronomers are still learning about sunspots and about their
游客
2024-06-10
37
管理
问题
Astronomers are still learning about sunspots and about their effects on us, but believe that the spots on the sun, which were first observed through a telescope by Galileo in 1610, are electrical in nature.
Sunspots vary in size from what appear to be small specks on the sun’s surface, to at least 90,000 miles long, and 200,000 miles in length, and are visible on most clear days.
When sunspots release their electrical energy, they shoot beams of negatively charged electrons into space, some of which escape into the Earth’s atmosphere. These electrons create electrical effects, such as the aurora borealis, or Northern Lights, cause the disruption of radio transmissions, and increase the amount of ozone in the upper atmosphere. The additional ozone may absorb more than the usual amount of the sun’s heat, which in turn may affect our weather.
The sunspot cycle, is a recurring 11-year period over which the number of sunspots fluctuates and corresponds to the number of sun flares. An increase in the number of sun flares leads to an increase in the number of sunspots, and a decrease in the number of sun flares leads to a decrease in the number of sunspots,
Records of sunspots have only been kept for the last 100 years or so, leaving astronomers with little to back their research and much yet to discover about this phenomenon.
选项
A、They were created by Galileo in 1610.
B、They are electrical in nature.
C、They are created by nature.
D、They are there for almost thousands of years.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3627521.html
相关试题推荐
[originaltext]Sincethefirstprehistoricartistdrewthefirstpictureson
[originaltext]Sincethefirstprehistoricartistdrewthefirstpictureson
[originaltext]AnewschoolyearhasbeguninAmerica.Butsomechildrendo
[originaltext]Goodafternoon.IwanttothankProfessorJonesforgivingme
[originaltext]Goodafternoon.IwanttothankProfessorJonesforgivingme
[originaltext]M:Look,I’msorryIdidn’tturnupforthematchyesterday,but
[originaltext]M:Look,I’msorryIdidn’tturnupforthematchyesterday,but
[originaltext]M:Look,I’msorryIdidn’tturnupforthematchyesterday,but
[originaltext]M:Look,I’msorryIdidn’tturnupforthematchyesterday,but
[originaltext]Manychildrenfirstlearnthevalueofmoneybyreceivingan
随机试题
Doesyourcitysufferfromtrafficcongestion?Why? Yeah,thetrafficinmycit
HarshRealityoftheAmericanDream
凯越公司拟进行一项开发性投资,甲方案第一年需投资固定资产80万元,使用寿命为
32岁女性。有反复关节红肿病史,因活动后心悸、突发呼吸困难及咳粉红色泡沫痰入院。
依据证券投资法规规定,我国封闭式基金的募集期限为()个月。A.1 B.2
沉淀法测定巴比妥类药物的含量,采用的滴定液是()A.氢氧化钠滴定液 B
类风湿性关节炎的X线表现为 A.关节间隙狭窄,关节边缘有“骨剌”形成B.骨质
独立董事的每届任期与该上市公司其他董事的任期相同,任期届满,可以连任,但是连任时
下列关于信用衍生品作用的描述中,错误的是()。A.使得银行得以摆脱在贷款定价上的
未取得卫生许可证从事食品生产经营活动的,予以取缔,没收违法所得,并处以下数量的罚
最新回复
(
0
)