Composition class should begin, classmates have some of be agitated, everybody does not think. Abrupt, fill a teacher to pretended to be uncannily to go slowly, this can not be her all along the style of with the power of a thunderbolt and the speed of lightning, our discovery fills teacher hand to go up to did not take pron any thing, at this moment her uncannily laughs, say: We come to “ today do little test. ” is saying to walk out of a classroom to take material again. Classmates were stupefied one second, subsequently all sorts of stealing stole murmurous sound to ring. What test does “ do? Won't ”“ be an egg? ”“ should not be. Various problems risked ” to come out then, classmates also say to jump over excitement more, some people can'ted help standing, look to the probe outside the door.
作文课要开始了，同学们都有些烦躁，谁也不想上。突然，盛老师慢慢地故作神秘地走了进来，这可不是她一向雷厉风行的作风，我们发现盛老师手上没有拿任何东西，这时她神秘地一笑，说：“今天我们来做一次小实验。”说着又走出教室拿器材去了。同学们愣了一秒钟，随后各种窃窃私语的声音响了起来。“做什么实验啊？”“不会又是鸡蛋吧？”“应该不是。”各种各样的问题一个接着一个冒了出来，同学们也越说越兴奋，有些人都不禁站了起来，向门外探头看去。
Not a little while, filled a teacher to go again, this, on her hand many the floret of a white mixes a bottle by paper closely the small bottle of entwine. That small Bai Hua looks to know is done by hand, two leaf are shaking on beautiful bine. Fill a teacher to be on dais, announce to say: This experiment calls “ ‘ become angry beautiful ’ . ”
不一会儿，盛老师再次走了进来，这次，她的手上多了一朵白色的小花和一瓶被纸紧紧缠住的小瓶子。那朵小白花一看就知道是手工做的，两片叶子在花茎上摇晃着。盛老师走上讲台，宣布说：“这个实验叫‘变色花’。”
In classmates urgent below, filled teacher carelessly to say opening remarks, the experiment began.
在同学们的催促下，盛老师草草说完了开场白，实验开始了。
Fill a teacher to take Bai Hua cautiously, reoccupy right hand holds that small bottle, the classmate of sharp-eyed discovers to there is a gules liquid on bottle immediately. Be red ink? So won't simple. Thinking in my heart, next, fact test and verify my guess, flavour of a vinegar comes dispersedly, a few classmates stand up immediately cry: “ is white vinegar, white vinegar is in bottle. ” filled a teacher to listen to mystery to laugh, shake one's head, this movement instead trice the curiosity that everybody writes a composition, each head is gone to dais there explore.
盛老师小心翼翼的拿起白花，再用右手抓住那个小瓶子，眼尖的同学立刻发现瓶子上有一丝红色的液体。难道是红墨水？不会这么简单吧。我心里想着，然后，事实便验证了我的猜测，一股醋味散开来，几位同学立刻站起来喊：“是白醋，瓶里是白醋。”盛老师听了神秘一笑，摇了摇头，这个动作反而吊起了大家作文的好奇，一个个脑袋往讲台那儿探。
The hand that fills a teacher was moved, she opened cap, forefinger pressed the button on bottle, aimed sparge mouth petaline, ground of our fix eyes on is looked at, fill a teacher to also have some of insecurity, complexion dignified. Pressed gently pushbutton, a kind of unidentified liquid was gone to by gush on leaf, on leaf much the dot of purple of a pink, classmates see more muddleheaded more. This has not been over, filled a teacher to aim sparge mouth again beautiful leaf, press gently again, leaf became green actually. Is “ to do this beautiful paper to differ? A classmate asks ” . Fill a teacher to shake his head again, you guess “ incorrectly, let me tell you the principle of this experiment. ”
盛老师的手动了，她打开了瓶盖，食指按住了瓶上的按钮，把喷雾口对准了花瓣，我们目不转睛地看着，盛老师也有些紧张，脸色凝重。轻轻地按下了按钮，一种不明液体被喷到了花瓣上，花瓣上便多了一个粉紫色的圆点，同学们越看越糊涂。这还没完，盛老师又把喷雾口对准了花的叶子，再轻轻一按，叶子竟然变成了绿色。“难道是做这个花的纸不同？”一位同学问道。盛老师又摇了摇头，“你们猜得都不对，让我来告诉你们这个实验的原理吧。”
Then, fill a teacher to tell us, she besmeared on leaf before the experiment white vinegar, and besmeared on leaf and bine mineral. The liquid in that bottle is not white vinegar, however juice of violet wild cabbage. Juice of violet wild cabbage belongs to neuter material, white vinegar belongs to acidity material, and mineral is basic material. There is cyanine element in juice of violet wild cabbage, cyanine element is material of a kind of water-solubility, its color can differ because of acid-base value and change color, so, came up against the white vinegar that contains acidity material to go up when the cyanine element in juice of violet wild cabbage, became slant gules, and came up against contain alkalescent mineral to went up to become green.
接着，盛老师告诉我们，她在实验之前在花瓣上涂了白醋，而叶子和茎上则涂了苏打水。那个瓶子里的液体不是白醋，而是紫甘蓝汁。紫甘蓝汁属于中性物质，白醋属于酸性物质，而苏打水则是碱性物质。紫甘蓝汁里有花青素，花青素是一种水溶性物质，它的颜色会因酸碱度不同而改变颜色，所以，当紫甘蓝汁里的花青素碰到了带有酸性物质的白醋上，就变成了偏红色，而碰到了带有碱性的苏打水上就变成了绿色。
Although the principle of this experiment involves a lot of knowledge that we did not acquire, but still make we are benefited quite much.
这个实验的原理虽然涉及到许多我们没有学到的知识，但还是使我们受益颇多。
Backside of each small experiment can have a scientific principle, it can make we acquire knowledge in the experiment, knowledge is scientific.
每一个小实验背后都会有一个科学原理，它会使我们在实验中学到知识，了解科学。(文/田嘉蕙)