求 science fair All questions should be able to be restated as "what is the relationship between this and that?" NOT "Does this have any effect?" Also,you need to be able to measure your results.就是一个题目关于两个物质之间的关系的

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求 science fair All questions should be able to be restated as "what is the relationship between this and that?" NOT "Does this have any effect?" Also,you need to be able to measure your results.就是一个题目关于两个物质之间的关系的
求 science fair
All questions should be able to be restated as "what is the relationship between this and that?" NOT "Does this have any effect?" Also,you need to be able to measure your results.就是一个题目关于两个物质之间的关系的!之前的题目是二氧化碳和温室效应的关系.因为不好测量所以被否掉了!谁能帮下忙啊!T^T

求 science fair All questions should be able to be restated as "what is the relationship between this and that?" NOT "Does this have any effect?" Also,you need to be able to measure your results.就是一个题目关于两个物质之间的关系的
额,必须要课本上没有的实验么?
比如你可以去讨论下不同物质在水中的溶解度随温度的关系,有的物质溶解度随温度增大而增大,有的物质正好相反.然后利用这种特性可以应用到重结晶里,用来分离和提纯固体.
如果你想创新,那就讨论气体在水中的溶解度和压力的关系.当然气体的选择要合适,别选NH3那种极易溶于水的,选CO2或者其他在水中溶解度不是很大的气体.或者讨论一种物质在不同溶剂中的溶解度,然后从溶质和溶剂的分子结构等方面加以讨论,比如相似相容啊,氢键啊什么的

All In Love Is Fair 求 science fair All questions should be able to be restated as what is the relationship between this and that? NOT Does this have any effect? Also,you need to be able to measure your results.就是一个题目关于两个物质之间的关系的 science fair topic!给我个方向吧! 求翻译 state fair All is fair in war All covet,all lose All is fair in love and all is fair in love and fair fair fair fair Maths Science spanish Art science 求翻译! how does the amount of sugar affect the fermentation?这是science fair project! 求帮个忙呀! 我要做一个science fair project 不过不知道做什么好有什么实验,但是实验结果不明显.(Science Fair Project) 最好是关于物理实验的 Science Fair Project,Any ideas?If yes,please sent websites.Thanks! My friends and I were all at the fair中译英 Almost all states in America have a state fair.