高中英语外研版 (2019)必修 第三册Unit 3 The world of science导学案

这是一份高中英语外研版 (2019)必修 第三册Unit 3 The world of science导学案，共7页。

实验报告
假设你是红星中学高一学生李华，在科学课上完成了简单的科学小实验后，老师要求以“Writing an experiment reprt”为题，撰写一份关于科学实验的英文实验报告。请你根据以下要点完成写作，内容包括：
实验目的与实验器材；
实验步骤与实验结果；
实验结论与简单感悟。
注意： 1．词数80词左右； 2．可适当发挥，使行文连贯，实验内容可选取简单趣味科学实验。




审题谋篇
STEP Ⅰ审题构思出框架
①明确体裁话题→实验报告、主题The wrld f science，介绍一次简单的科学小实验。
②确定时态人称→一般过去时（叙述实验过程、结果）、一般现在时（说明目的、结论）；以第一人称为主（we/I）。
③ 构思文章框架→三段式：首段：说明实验目的，列举实验器材 中段：描述实验步骤，呈现实验结果 尾段：总结实验结论，抒发科学感悟。 接下来细化主要内容→实验步骤的描述（这个是本篇文章的重难点） 在这里给出一个例子：清水浮鸡蛋实验。实验目的：探究盐水的浮力变化；器材：杯子、清水、鸡蛋、食盐、搅拌棒等等 将步骤按逻辑顺序表述清楚即可组成文章中段主要部分。 STEP Ⅱ 完整句子表达
1. 本次实验的目的是探究盐水浓度对水的浮力的影响。
The purpse f this experiment is t explre the effect f salt water cncentratin n the buyancy f water.
好句积累
关于表达“实验目的”的可替换句子
This experiment is designed t find ut hw the cncentratin f salt water affects water's buyancy.
We d this experiment t research the influence f salt water cncentratin n the buyancy f water.
我们准备的实验器材包括一个玻璃杯、一枚鸡蛋、清水、食盐和一根搅拌棒。
The experimental equipment we prepared includes a glass cup, an egg, clean water, salt and a stirring stick.
好句积累
关于“列举物品”的表达
We have prepared the fllwing experimental materials: a glass cup, an egg, clean water, salt and a stirring stick.
Fr this experiment, we gt all the materials ready: a glass cup, an egg, clean water, salt and a stirring stick.
首先，我们将清水倒入玻璃杯中，再把鸡蛋轻轻放入水中，鸡蛋立刻沉到了杯底。
Firstly, we pured clean water int the glass cup, then put the egg int the water gently, and the egg sank t the bttm f the cup at nce.
接着，我们向水中加入适量食盐，并用搅拌棒快速搅拌，让食盐充分溶解在水中。
Then, we added an apprpriate amunt f salt t the water and stirred it quickly with a stirring stick t make the salt disslve in the water fully. 练习（仿写句子，用不同从句/连接词）
接着，我们分三次往水里加食盐，每次加完后都用搅拌棒搅拌，直到食盐完全溶解。 ___________________________________________________________
首先，我们把薄纸片折成小船的样子，再将它轻轻放在水面上，小船能稳稳地浮在水面。

然后，我们用滴管向纸船中间滴一滴水，纸船就慢慢沉入了水中。 ___________________________________________________________
首先，我们将两支蜡烛固定在盘子里，倒入少量清水，再用打火机点燃蜡烛芯。 ___________________________________________________________
5. 此外，我们不断增加食盐的量并重复搅拌，当盐水达到一定浓度时，鸡蛋慢慢浮了起来。
In additin, we kept adding salt and repeatedly stirring, and the egg flated up slwly when the salt water reached a certain cncentratin.
6.实验结果非常明显，盐水的浓度越高，鸡蛋在水中的浮起程度就越大。
It was very bvius that the result f the experiment was that the higher the cncentratin f salt water was, the mre the egg flated in the water.
7.这个有趣的实验现象，让我们直观地看到了浮力与液体浓度之间的关联。
This interesting experimental phenmenn made us see the cnnectin between buyancy and liquid cncentratin intuitively.
练习（合并改写，用不同从句）
第5句与第6句用“时间状语从句”合并 ___________________________________________________________
第6句与第7句用“非限制性定语从句”合并 ___________________________________________________________
第5句、6句、7句用“宾语从句+定语从句”整合 ___________________________________________________________8. 从这个实验中，我们可以得出结论：液体的浓度越大，其产生的浮力就越大。
Frm this experiment, we can draw the cnclusin that the higher the cncentratin f the liquid is, the greater the buyancy it prduces is.
这次简单的实验让我感受到了科学世界的奇妙，也激发了我探索科学的兴趣。
This simple experiment made me feel the wnder f the wrld f science and als arused my interest in explring science.
只要我们用心观察、动手实践，就能在生活中发现更多科学的奥秘。
As lng as we bserve carefully and practice by ding, we can discver mre scientific mysteries in ur life.
练习（改写，用不同从句）
用 条件状语从句+定语从句 改写第10句 __________________________________________________________ 2. 用 倒装句+宾语从句 改写第9句 __________________________________________________________ STEP Ⅲ 增加衔接句，成篇。
One pssible versin
The purpse f this experiment is t explre hw salt water cncentratin affects water's buyancy. We prepared a glass cup, an egg, clean water, salt and a stirring stick fr it.
Firstly, we pured water int the cup and put the egg in it, which sank t the bttm quickly. Then we added salt and stirred it fully. When we added enugh salt, the egg flated up slwly. The result shwed that the higher the salt water cncentratin was, the mre the egg flated.
Frm this experiment, we cnclude that a mre cncentrated liquid has greater buyancy. It makes me feel the magic f the wrld f science and encurages me t explre mre scientific secrets in daily life. 参考例句
仿写句子参考
Then, we added salt t the water three times, and stirred it with a stirring stick after each additin until the salt disslved cmpletely.
Firstly, we flded the thin paper int the shape f a bat and put it gently n the water surface, and the bat culd flat n the water steadily. 3. Then, we drpped a drp f water int the middle f the paper bat with a drpper, and the paper bat sank int the water slwly.
4.Firstly, we fixed tw candles in a plate, pured a little clean water int it, and then lit the candle wicks with a lighter.
合并改写句子参考
When we kept adding salt and repeated stirring until the salt water reached a certain cncentratin, the egg flated up slwly, and the result was very bvius that the higher the cncentratin f salt water was, the mre the egg flated in the water.
The result f the experiment was very bvius that the higher the cncentratin f salt water was, the mre the egg flated in the water, which made us see the cnnectin between buyancy and liquid cncentratin intuitively.
We fund that when the salt water reached a certain cncentratin after we kept adding salt and stirring, the egg flated up slwly, a phenmenn that let us see the cnnectin between buyancy and liquid cncentratin intuitively.
练习（改写，用不同从句）
If we are willing t bserve the life arund us carefully and practice by ur wn hands, we can discver mre scientific mysteries that are hidden in ur daily life.
2. S wnderful is the wrld f science that this simple experiment made me realize its magic and als arused my interest in explring what science hides in ur life.