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
Chemistry What is the main purpose to the talk?
Chemistry What is the main purpose to the talk?
admin
2013-04-25
30
问题
Chemistry
What is the main purpose to the talk?
Chemistry is sometimes called the central science. This isn’t surprising, since most of the processes going on around us involve chemical changes. Here are just a few of them:
A plant grows by changing simple substances into more complex substances.
The steel in a car rusts.
Eggs, sugar, flour, and baking powder are mixed and baked into a cake.
Emissions from a power plant cause the formation of acid rain.
Chemistry is the science that deals with the materials of the universe and the changes these materials go through. Chemistry is at the heart of our efforts to create new materials to make our lives better—for example, to produce new sources of energy. Chemists work on a lot of different things. Some examine the fundamental particles of matter. Others are looking for molecules in space. Still others are looking for ways to control the diseases that threaten our food supply or us.
But whatever the work, all chemists need certain skills. When my former students come back to visit me, they all say the same thing. They say that what’s essential in their success is an understanding of the fundamentals, the ability to solve problems, and the ability to communicate.
Some people think education is just storing information in the brain. A lot of students just want to memorize lists of facts and then sort of spit it all out on tests. Of course, storing facts in the brain is important. The language of chemistry is unfamiliar at first, and you do have to memorize a lot of terms and definitions. YOU have to learn the vocabulary before you can communicate. Memorizing facts is important, but it’s just the beginning of education. Don’t stop there. Don’t be afraid to do some thinking of your own, and don’t be afraid to trust yourself to figure things out. Analytical thinking is the center of education.
hemistry courses have a reputation for being difficult. This isn’t surprising, since chemical systems are, welt, complicated. Don’t expect to understand everything right away. Just remember that even experienced chemists don’t understand everything at first. It’s not a disaster to make a mistake, but it could be, if you don’t learn from your mistake.
To solve a typical chemistry problem, you have to go through the given information and decide what information is really important. If you can’t do one of the homework problems, don’t just look up the answer in the back of the book. That’s not how you learn. You’ll learn more if you go back and review the relevant material, and then try the problem again. Don’t be afraid to struggle with it. If you do struggle with the problems, then find a classmate to work with, and struggle together. Actually, this is kind of a good way to learn about how scientists work together, trying one thing and then another until they come up with a solution.
It takes time to learn chemistry. You might not understand everything at first, and you might not be able to do the problems the first time you try. You might feel frustrated when you make a mistake. Just keep working—and learning from your mistakes—and you’ll make steady progress.
选项
A、To test the students’ ability to understand chemistry
B、To explain different kinds of chemical processes
C、To list the jobs available to chemistry graduates
D、To introduce the students to the study of chemistry
答案
D
解析
The main purpose of the talk is to introduce the students to the study of chemistry. The professor says Chemistry is the science that deals with the materials of the universe and the changes these materials go through; Chemistry courses have a reputation for being difficult; Don’t expect to understand everything right away, To solve a typical chemistry problem...; It takes time to learn chemistry. (2.3)
转载请注明原文地址:https://kaotiyun.com/show/B4yO777K
0
托福(TOEFL)
相关试题推荐
Theprofessorsaysthatsuperhighways______.【30】
Inthemiddlepart,Klaraneedstousea______.HowmuchlongerdoesKlarahavetofinishtheproject?
Whattimedoesthelibraryopen?Whendoesthesportscentreopen?
Completethenotesbelow.WriteONEWORDONLYforeachanswer.Notestobeaddedtopolicy:Addnewdriver:Name
Choosethecorrectletter,A,BorCWhatdoesthecustomerwantdonewithclothes?
Choosethecorrectletter,A,BorC.Thecoursehasimprovedtheenvironmentsince
A、She’sunabletoattendthestudysession.B、Shehasseenadoctorrecently.C、She’sconcernedaboutmedicalcare.D、Shementio
A、She’safraidofgettinghurtB、Shewon’tbefreethisweekendC、She’drathergotoMountHopeD、Shepreferstogoskiingbyhe
ConversationOralReportWhatinformationwillthestudentsprobablyincludeintheirreport?Clickontwoanswers.
ThefirstpeoplestoinhabitwhattodayisthesoutheasternUnitedStatessustainedthemselvesashuntersandgathers.Sometimes
随机试题
财政政策工具不包括()。
火灾报警控制器的备用电源在放电至终止电压条件下充电24h,其容量应可提供火灾报警控制器在监视状态下工作8h后,当火灾报警控制器容量超过10个报警部位时,不少于10个报警部位,但不超过32个报警部位处于报警状态下时,持续工作时间不应小于(
患者,女,45岁,阵发性心悸,反复发作10年入院,发作时心电图诊断为“心动过速”,HR188/min,静脉注射“维拉帕米”后症状很快缓解,入院第2d患者再次心悸,伴乏力,尿频感,心电图示:HR180/min,节律规整,QRS波群形态及时限均正常,未见明显
根据《关于加强城市总体规划修编和审批的工作的通知》的规定,总体规划的修编工作应当按照一定的要求进行,该要求不包括()
规定了学科的性质和地位,教育目的和任务,内容范围和进程安排以及教学时数与作业布置,考试要求和教法建议的文件是()。
请从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。()
根据《行政处罚法》,违法行为在一定期限内未被发现,不再给予行政处罚。该期限为()。
泡沫经济是指通过能定期带来收入,以有价证券形式表现的资本及其衍生出的虚拟经济(即市场经济中信用制度与资本证券化的产物)的过度发展导致的投资过度的经济现象。根据上述定义,下列选项中不属于泡沫经济的是:
关系数据库规范化理论的研究中,在函数依赖的范畴内,______达到了最高的规范化程度。
考生文件夹下存在一个数据库文件“samp2.accdb”,里面已经设计好“tStud”“tCourse”“tScore”三个关联表对象和一个临时表“tTemp”及一个窗体“tTmp”。试按以下要求完成设计:创建一个参数查询,查找并显示学生的“学号”“姓
最新回复
(
0
)