共查询到20条相似文献，搜索用时 765 毫秒
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一个完整的生物学实验题考查内容包括：实验原理、实验目的、实验假设、实验步骤、实验现象、实验结果分析以及实验结论的获得,甚至包括实验前准备。其中实验步骤是一个实验的中心环节,是利用实验原理获得实验结论或者验证实验目的的过程,几乎是每年生物学高考所有实验题都会涉及到的内容。 相似文献
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王福星 《中学物理教学参考》2012,(4):55-60
人教版初中物理教材中有24个比较重要的实验,虽然各个实验的实验目的不同,但有些实验所用的器材却相同;有些同一个实验却可以依据不同的实验原理,选用不相同的实验器材;还有些实验虽然实验器材和实验目的都不相同,但实验的设计方法却相同.我们把这三类实验进行分析对比,以引导学生加深对实验的理解.一、实验器材相同,实验目的不同的实验有些物理实验,尽管用的实验器材相同,但由于 相似文献
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本文在笔者已发表的单个实验到连环实验,结论实验到过程实验、"完美"实验到不成功实验、单科实验到跨学科实验、"平淡"实验到"刺激"实验、平面实验到竖直实验六个方面改变的基础上,从另外六个方面再谈物理演示实验的改变。 相似文献
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实验是形式和内容的统一体,实验的形式和内容又是对立统一的。通过更新实验形式,改验证性实验为探究性实验,改演示实验为师生协同实验,改固定实验小组为自由结伴小组,改教师提供材料为学生选用材料,改课内实验为课前课后实验,改封闭性实验为开放式实验。改只重操作结果为重操作过程,可以有效地完善实验的内容,提升实验的品质,增强实验的效果。 相似文献
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齐慧艳 《中国科教创新导刊》2013,(18):25-25
初中物理实验题要抓住实验目的,所有的实验都是围绕实验目的进行的。实验在物理这门课中具有十分重要的位置,它是物理知识的重要组成部分。学习物理,要高度重视实验。教材中的实验探究、小实验要尽可能自己动手做。要逐步学会根据实验的目的选择实验仪器、设计实验方案、按规则进行实验,以实事求是的科学态度分析实验现象和实验数据、得出实验结论。 相似文献
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物理实验中,控制好实验的条件是获得成功实验的关键．实验条件的控制是指在实验开始前、实验过程中以及实验结束时对实验装置与环境的控制．下面笔者就中学物理实验中如何控制实验条件进行探讨． 相似文献
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化学是一门实验性很强的基础学科,通过教师演示实验、观看实验录像和学生实验操作,培养学生的实验能力。本文简要叙述了通过创设趣味实验、投影演示实验、组织分组实验、利用选做实验、布置实验作业、做家庭小实验等六个方面培养学生实验能力的方法。 相似文献
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朱毅鸿 《福建基础教育研究》2012,(5):119-120
由于现行初中生物教材中实验的数量大幅度增加,对实验能力的要求也显著提高,有的实验内容对于教师来说是首次接触,要保证实验成功,做好生物预实验就显得尤其重要。所谓预实验,是指在进行科学研究时,在正式实验前进行的实验。预实验可以使教师了解实验的内容、实验的条件并可以验证实验原理、估计实验误差、确定实验结果,同时还可以了解实验中可能出现的问题及解决方法,从总体上把握实验的内容及要求。 相似文献
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“绿叶中色素的提取和分离”实验是人教版高中生物学中的一个重要实验,但教材中原有实验方案存在一些不足。经过多次实验,从实验材料、实验方法、实验装置方法等方面进行改进,并拓展光的色散实验和叶绿素破坏实验,取得了较好的实验效果。 相似文献
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生物实验是历年高考的重点考查内容，分析近几年的高考试题可以看出，对实验的考查已从了解实验原理、明确实验目的、掌握实验方法与步骤、分析实验现象、得出实验结果，逐步过渡到能够根据实验目的科学设计实验程序，合理利用实验材料得出科学结论。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献