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
Write ONE WORD ONLY for each answer. Name TWO elements which produce weather: (31) (32)
Write ONE WORD ONLY for each answer. Name TWO elements which produce weather: (31) (32)
admin
2012-01-16
85
问题
Write ONE WORD ONLY for each answer.
Name TWO elements which produce weather:
(31)
(32)
Good morning. It’s good to see so many of you taking an interest in meteorology. As you are all newcomers to the topic, let’s keep it simple to start with. ha fact, let’s begin with a very simple definition of what meteorology is—the suffix ’ -logy ’ gives you a clue—at least you can all guess that it is’ the study of ’...something. Meteorology is in fact the scientific study of all changes in the atmosphere—essential for forecasting the weather, of course. And you all know what weather is, right? The four main ingredients are...the sun, the atmosphere, water vapor and the wind. They all come together, disseminating heat from the sun around the globe and making clouds in the layer of the atmosphere directly above the ground which is called the troposphere. Look up into the sky and on almost any day of the year you’ll see clouds.
Clouds form when water that has evaporated from the surface of the Earth condenses onto microscopic dust particles (or other particles ) floating in the air. Cloud formation takes different shapes and they mostly get their names from Latin roots. Now, let’s look at the five most basic. We’ll start with Cumulus which is a low cloud with a white, puffy appearance and most often composed of water droplets. It gets its name from ’ cumuli’ meaning ’ heap’ for its typical ’piled-up’ appearance.
Now, let’s move on to Stratus (from ’ strata’ meaning ’ layer’ )—these are the grey, horizontal ones (often with a fiat base) that you see on an overcast day and they too are mostly made up of water droplets. At this point, I should mention Fog, which you probably don’t even think of as clouds, but fog consists of very low stratus—ground-hugging clouds. The high altitude Cirrus cloud, on the other hand is mostly made of ice crystals and appears wispy and thin—almost hair-like—in fact, that’s where they get their name...from the word ’cirri’ meaning ’wisp of hair’. They are generally fair-weather clouds.
Not so the Cumulonimbus—the tallest of all clouds—they extend way up into the troposphere and these are the ones that produce lightning, thunder, heavy rain, strong winds and tornadoes. Beware the Cumulonimbus! You already know what cumuli means and it won’t surprise you to find out that ’nimbus’ means ’rain’ and, added as a suffix, is an indication of the cloud’s ability to produce precipitation which could be rain, snow or hailstones.
As this course progresses, you’ll learn a lot more about cloud types but before I finish today, I want to go back to something I mentioned before—dust. It is generally accepted that when water vapor ascends in the process of cloud formation it condenses onto dust particles. So, it was assumed, large dust particles would produce larger droplets and enhance the formation of rain. However, recent research has shown the opposite to be true. Droplet size increases the farther the clouds are from dust-filled air. More dust reaching rain clouds produces less rainfall. Scientists have shown that as more and more dust enters a rain cloud, the same amount of water becomes spread out. The resulting smaller water droplets scatter instead of combining and growing large enough to make up raindrops.
This study shows that higher dust frequency is not inevitably the result of diminished rainfall but rather its cause! Therefore, loss of topsoil from over-grazing, over-cultivation or bad livestock management in areas neighboring desert will contribute to the continuing expansion of those arid regions.
Your assignment for this week will be to read up on this research and write a report on how dust from damaged land may exacerbate drought conditions and lead to further desertification of arid areas. In other words, how land use has an impact on climate change.
选项
答案
sun, atmosphere/troposphere, vapour, wind
解析
转载请注明原文地址:https://kaotiyun.com/show/vRAO777K
本试题收录于:
雅思听力题库雅思(IELTS)分类
0
雅思听力
雅思(IELTS)
相关试题推荐
Thesignsthattheskeletonhadbeentamperedwithwereso______(that)thearchaeologistalmostfailedtonoticethem.
Althoughrecentyearshaveseensubstantialreductionsinnoxiouspollutantsfromindividualmotorvehicles,thenumberofsuch
ManytheoristsnowdoubtthatheatlossfromEarth’scoreandradioactivedecayaresufficientbythemselvestoproduceallthe
Forsomeoneas(i)______asshe,whopreferredtospeakonlywhenabsolutelynecessary,hisrelentlesschatterwascompletely(i
ThestartlingfindingthatvariationsintherateoftheEarth’srotationdependonan(i)____degreeontheweatherhasnecessi
Whichdidyouenjoymoreasachild,watchingTVorplayingoutside?
WRITINGTASK1Youshouldspendabout20minutesonthistask.Thediagramshowshowpaperclipsareproduced.Writead
Youshouldspendabout20minutesonthistask.Thediagramsbelowshowthedevelopmentofasmallfishingvillageanditssurro
Protectivebehaviorsof(amphibians)includehiding(in)thepresenceofdangerand(having)coloration(such)closelymatching
随机试题
本例最可能的诊断为本病的胸部X线片可能有下列改变,除了
我国进口货物运输保险可分为预约保险和逐笔保险两种方式。买方采用逐笔保险方式一般是在()。
某企业为掩盖超额发放工资问题,故意隐瞒部分工资项目,未在统计报表中计入,该企业行为属于()。
网球运动在上海越来越流行了。
作为一名驾驶员,应该熟识道路交通标志。作为一名交警,更要熟识这些标志,作为执法依据。下列标志中,不属于禁令标志的是()。
《尚书·康诰》载:“人有小罪,非眚,乃惟终,自作不典,式尔,有厥罪小,乃不可不杀”。这里的“非眚”是指()(2018年非法学综合课单选第33题)
在认识的辩证运动过程中,我们既要注重理性因素的作用,同时也不可忽视非理性因素的作用。非理性因素主要是指认识主体的情感、意志、欲望、动机、信念、习惯、本能等意识形式。以下属于非理性因素的是()
Nextweekyou’dbetterbringallyourquestionshere.We’regoingtohaveaquestion-and-answer______.
说实话,直到昨天我才知道他们去上海了。
A、ChildrenmaygetwhattheyneedfromtheInternet.B、TheInternetdoesmoreharmthangoodtochildren.C、Childrencangetexp
最新回复
(
0
)