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
Scientific Theories In science, a theory is a reasonable explanation of observed events that are related. A theory often inv
Scientific Theories In science, a theory is a reasonable explanation of observed events that are related. A theory often inv
admin
2015-01-13
30
问题
选项
答案
Scientific Theories In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A useful theory, in addition to explaining past observations, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientist’s predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected. Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are formulated. These possible solutions are called hypotheses.
解析
转载请注明原文地址:https://kaotiyun.com/show/FIHK777K
0
专业英语四级
相关试题推荐
Manygenerationsago,theIroquoispeoplelivedinastateofperpetualwarthroughouttheirhomelandsinwhatisnowNewYorkS
IstartfrommyhomeinthequietlittlesuburbofForestHills,LongIsland.Here,surroundedbygreenlawns,trees,andflower
ThismonthshopsintheUKwillbegintophaseouttraditionaltungstenbulbsaspartofagovernmentplantoreplacethemcompl
Prolongedsleepdeprivationincreasestheriskofsufferingfromastrokeorheartdisease,accordingtoamajorlong-termstudy
Whilethe1970spoppsychotherapymovementfocusedontheimportanceoflettingangerout,morerecentresearchsuggeststhatth
AmericanhopesthatpressurefromtheUSwillforceJapantosuddenlydismantleitstradebarriersarealmostcertaintoevapora
LouisBraileledesignedaformofcommunicationenablingpeopleto______andpreservetheirthoughtsbyincorporatingaserieso
Itisrareforataleofacademicmismanagementinasmallinstitutiontograbnationalattention.ButSciences-Poisnoordinar
IsContinuingEdforYou?Continuingeducationisimportantforeveryonenow,inallfields.Almostassoonasyou’vecompl
Aselectriclinesweredestroyedbythestorm,theywereforcedto______lightforseveraldays.
随机试题
风热犯肺证与肺热炽盛证最具区别的症状是
雷尼替丁对下列哪一种疾病疗效最好
根据《特种作业人员安全技术培训考核管理规定》,施工企业每个类别的特种作业人员一般不超过全体从业人员的()。
羊群行为产生原因包括()。Ⅰ.推卸责任的需要Ⅱ.信息不完全Ⅲ.减少恐惧的需要Ⅳ.缺乏知识经验
某教师为了让学生们认识到只有学好化学知识,才能解决生活中的实际问题,在教学过程中利用多媒体展示“南极臭氧空洞”的图片、环保部门对大气检测的资料片,以及机动车辆尾气排放图片、工厂排放废气而产生“浓烟滚滚”的景象等。该情境属于()。
从图中可以看出,2001年北京、上海、福建三省市地方财政收入与财政支出差距十分接近,但从地方财政收入占GDP的比重看()。
Oneproblemwithmuchpersonalityresearchisthatitexaminesandrateswhatevertraitstheresearchersareinterestedinatth
《计算机软件产品开发文件编制指南》(GB8567—88)是(4)标准。
有如下程序:#includeusingnamespacestd;classSample{public:Sample(){}~Sample(){
The(host)______wasabeautifulwoman.
最新回复
(
0
)