首页
登录
职称英语
Lightning Cloud-to-ground lightning bolts are a common phenomenon, about 100
Lightning Cloud-to-ground lightning bolts are a common phenomenon, about 100
游客
2023-12-29
37
管理
问题
Lightning
Cloud-to-ground lightning bolts are a common phenomenon, about 100 strike Earth’s surface every single second, yet their power is extraordinary. Each bolt can contain 【L1】______volts of electricity.
This enormous 【L2】______is caused by an 【L3】______between positive and negative charges. During a storm, 【L4】______of rain, ice, or snow increase this imbalance and often negatively charge 【L5】______storm clouds. Objects 【L6】______, like steeples, trees, and the Earth itself, become 【L7】______—creating an imbalance that nature seeks to remedy 【L8】______between the two charges.
A step-like series of 【L9】______, called a stepped leader, works its way incrementally downward 【L10】______a storm cloud toward the Earth. Each of these segments is about 46 meters long. When the lowermost step comes within 46 meters of a positively charged object it is met by a 【L11】______ of positive electricity, called a streamer, which can 【L12】______ through a building, a tree, or even a person. The process forms a channel 【L13】______ electricity is transferred as lightning.
Some types of lightning, including the most common types, never leave the clouds but 【L14】______ between differently charged areas 【L15】______. Other rare forms can be 【L16】______ extreme forest fires, volcanic eruptions, and snowstorms. Ball lightning, a small, charged sphere that floats, glows, and bounces along oblivious to the laws of gravity or physics, still 【L17】______.
Lightning is extremely hot—a flash can 【L18】______around it to temperatures five times hotter than the sun’s 【L19】______. This heat causes surrounding air to rapidly expand and vibrate, which creates the 【L20】______we hear a short time after seeing a lightning flash. [br] 【L16】
Lightning
Cloud-to-ground lightning bolts are a common phenomenon—about 100 strike Earth’s surface every single second—yet their power is extraordinary. Each bolt can contain up to one billion volts of electricity.
This enormous electrical discharge is caused by an imbalance between positive and negative charges. During a storm, colliding particles of rain, ice, or snow increase this imbalance and often negatively charge the lower reaches of storm clouds. Objects on the ground, like steeples, trees, and the Earth itself, become positively charged—creating an imbalance that nature seeks to remedy by passing current between the two charges.
A step-like series of negative charges, called a stepped leader, works its way incrementally downward from the bottom of a storm cloud toward the Earth. Each of these segments is about 46 meters long. When the lowermost step comes within 46 meters of a positively charged object it is met by a climbing surge of positive electricity, called a streamer, which can rise up through a building, a tree, or even a person. The process forms a channel through which electricity is transferred as lightning.
Some types of lightning, including the most common types, never leave the clouds but travel between differently charged areas within or between clouds. Other rare forms can be sparked by extreme forest fires, volcanic eruptions, and snowstorms. Ball lightning, a small, charged sphere that floats, glows, and bounces along oblivious to the laws of gravity or physics, still puzzles scientists.
Lightning is extremely hot—a flash can heat the air around it to temperatures five times hotter than the sun’s surface. This heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder we hear a short time after seeing a lightning flash.
选项
答案
sparked by
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3314715.html
相关试题推荐
______mostcommonkindoffuelusedby______peasantsinourdistrictiswood.A、a
______umbrellasarecommonlyusedtoprotect______peoplefrom______rain.A、/...th
WorldWarIIiscommonlyacknowledged______someofthe20thcentury’smostnotab
______,CharlesDarwindidmuchtodisprovecommontheoriesaboutbiologicalevo
It’scommonlyacknowledgedthatinfantmortalityhasdeclinedbecauseofrecent
______alanguagefamilyisagroupoflanguageswithacommonoriginandsimila
Acommonquestionthatpeopleaskastorywriteriswhetherornothehasexperi
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
随机试题
It’snormaltothinkofaconversationastakingplacebetweenpeoplewhoar
太极拳(Taijiquan)是中华民族的宝贵财富,是东方文化的重要组成部分。作为中国古老的武术(martialarts)之一,其主要功能是武术攻防、锻炼
加强自我修养的途径是()。A.组织活动、委托任务 B.学习、座右铭、立志、自我
“由用药顺序确定最可疑致病药物.有意识地停用最可疑或引起相互作用的药物→根据停药
B
注意事项 1.申论考试与传统的作文考试不同,是分析驾驭材料的能力与表达能力并重
会员制期货交易所理事会会议应当于会议召开()日前通知全体理事。A.5 B
多动(注意缺陷)障碍的诊断要点是()。 (A)严重的注意力维持困难(B)常
施工图预算的编制方法主要有单价法和()两种。A:综合法 B:实物法 C:人工
在市场经济中,政府对运输服务实行征税,税收额由()承担。A:消费者 B:中间商
最新回复
(
0
)