首页
登录
职称英语
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_160[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_160[/audioFiles]
游客
2023-11-05
73
管理
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://tihaiku.com/zcyy/3161827.html
相关试题推荐
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_095[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_092[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_005[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_003[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_001[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_177[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_176[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_160[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_159[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_158[/audioFiles]
随机试题
ThepriceofinternationalcallsintoAmericais______.[br]AT&Trefersto___
Onceuponatime,innovationatProcter&Gambleflowedoneway:fromtheUn
Theobjectinthesentence"ShewishestolearnEnglishfromyou"isA、she.B、Eng
随着时代的进步,变革总在不经意间悄然而至。面对航空业风起云涌的变化,只有顺应潮流
在面向对象分析和设计中,用类图给出系统的静态设计视图,其应用场合不包括()。下
根据《建设工程质量管理条例》的规定,施工单应当建立质量责任制,确定工程项目的(
下面四个图形中,只有一个是由上面的四个图形拼合(只能通过上、下、左、右平移)而成
2012年第一季度与上年同期相比,上述八个城市中城镇居民家庭人均可支配收入增长量
德育过程的主要矛盾是教育者提出的()与受教育者已有的()之间
男,32岁。反复皮肤紫癜1个月,加重并腹痛2天。查体:四肢皮肤散在紫癜,心肺未见
最新回复
(
0
)